LibreOffice has a bibliography management tool. However the interface is not yet user-friendly and necessitate some learning time. For this reason, we advise you to use Zotero, which has a perfect compatibility with LibreOffice. It’s a very thorough, open source tool that allows bibliography management and automatic reference insertion in LibreOffice’s documents. You can download Zotero on the officiel website: zotero.org.
The main advantages of Zotero are a very user-friendly interface, easy insertion of data from website or documents (pdf, image,…) and a great number of bibliography standards availables. Moreover, a very complete documentation is available on Zotero’s website : zotero.org/[…] and numerous tutorial are available on the internet.
(source : zotero.org)