In order to write a good, academic thesis or scientific text, it is important to use sources in the right way. To reference means to give accurate information about the sources you have used, both in your running text and in a list of works cited or a bibliography. This is important as it shows that you have understood the norms of scientific integrity.
Reference tools - keep track of your references
In Endnote you can search in scientific databases, save references and insert them directly into the document you are writing in Word and other Office-programs.
You can use Zotero to create citations in Word, OpenOffice and LibreOffice, and it can easily be used with LaTeX.
Zotero works directly with Word, OpenOffice and LibreOffice. You may export references in BibLaTeX format to use with LaTeX.