diff --git a/README.md b/README.md
index 38ef7f1..4bc8640 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,6 @@ The directories are as follows:
 Acronyms are defined in the file `acros.tex`. Likewise, glossaries are all defined in `glossary.tex`.
 
 ## Build
-
 The project is intended to be build by TexLive through the use of latexmk. This is why there is a custom `.latexmkrc` file specified to keep the build process clean.
 
 ## Dependencies
diff --git a/config/bibtex.tex b/config/bibtex.tex
new file mode 100644
index 0000000..1ea1605
--- /dev/null
+++ b/config/bibtex.tex
@@ -0,0 +1 @@
+\bibliographystyle{unsrtnat}   % set listing style of reference sources: Harvard Method
\ No newline at end of file
diff --git a/main.tex b/main.tex
index e626677..6a6c2da 100644
--- a/main.tex
+++ b/main.tex
@@ -24,7 +24,8 @@
 \usepackage{listings}               % code listings
 \usepackage{color}                  % more colors
 \usepackage{tikz}                   % painting
-\usepackage{tikz-imagelabels}       % overlay labels for images 
+\usepackage{tikz-imagelabels}       % overlay labels for images
+\usepackage{cite}                   % citation for bibliography
 
 \makeindex
 \makenomenclature
@@ -33,6 +34,7 @@
 % include acronym definitions
 \input{acros}
 \input{glossary}
+\input{config/bibtex}
 % include file with fixes and workaround
 % as well as special settings
 \input{extra/fixes}
@@ -72,4 +74,7 @@
     % include all used chapters
     \input{pages/page-08-chapter}
 
+    % source references follow content of article
+    \input{pages/page-09-bibliography}
+
 \end{document}
diff --git a/pages/page-09-bibliography.tex b/pages/page-09-bibliography.tex
new file mode 100644
index 0000000..f2c1acf
--- /dev/null
+++ b/pages/page-09-bibliography.tex
@@ -0,0 +1,6 @@
+% =====================================================================
+% Bilbiography
+
+\cleardoublepage                            % should start on new empty page
+\addcontentsline{toc}{section}{Literatur}   % add table of contents entry
+\bibliography{../refs}                      % Entries are in the refs.bib file
\ No newline at end of file
diff --git a/refs.bib b/refs.bib
new file mode 100644
index 0000000..eb0382c
--- /dev/null
+++ b/refs.bib
@@ -0,0 +1,45 @@
+%  ____  _ _     _            
+% | __ )(_) |__ | |_ _____  __
+% |  _ \| | '_ \| __/ _ \ \/ /
+% | |_) | | |_) | ||  __/>  < 
+% |____/|_|_.__/ \__\___/_/\_\
+%
+% Biblatex database for storing bibliography entries that can be cited within the document.
+% See: https://www.overleaf.com/learn/latex/Bibliography_management_with_bibtex.
+%
+% --------------------------------------------------------
+% Reference a book:
+%
+% @book{reference-name,
+%   author    = {Donald E. Knuth},
+%   year      = {1986},
+%   title     = {The Book},
+%   publisher = {Addison-Wesley Professional}
+%   edition   = {2}
+% }
+%
+% --------------------------------------------------------
+% Reference an article:
+%
+% @article{reference-name,
+%   title     = {Literate Programming},
+%   author    = {Donald E. Knuth},
+%   journal   = {The Computer Journal},
+%   volume    = {27},
+%   number    = {2},
+%   pages     = {97--111},
+%   year      = {1984},
+%   publisher = {Oxford University Press}
+% }
+%
+% --------------------------------------------------------
+% For citing a certain reference within the document use:
+% \cite{reference-name}
+
+@book{somebook,
+  author    = {Donald E. Knuth},
+  year      = {1986},
+  title     = {The Book},
+  publisher = {Addison-Wesley Professional}
+  edition   = {2}
+}
\ No newline at end of file