所有手册书目的引用都变成了问号。
Show how bibliography works. The describtion of bibliography is at \url{https://en.wikibooks.org/wiki/LaTeX/Bibliography_Management}. The exam-ple refference here \cite{latexBasics} is the book about \LaTeX{}.
Example how to cite book found on Google Books. This book \cite{C functions} describes the secrets of functional programming using C\#.
\begin{thebibliography}{2}
\bibitem{latexBasics}
Leslie Lamport,
\textit{\LaTeX: document preparation system,}
Addison Wesley, Massachusetts, 2nd edition, 1994
\bibitem{C functions}
Anggoro, W.,
\textit{Functional C\#}
, Packt Publishing, isbn: 9781785881039,2016. URL:https://books.google.cz/books?id=O9DcDgAAQBAJ
\end{thebibliography}
