Zotero LibreOffice Integration
Zotero LibreOffice Integration makes it possible to insert citations and bibliography entries into LibreOffice Writer documents in thousands of different bibliography styles.
Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share your research sources. It lives right where you do your work—in the web browser itself. Zotero LibreOffice integration allows users to insert citations directly from their word processing software. This makes citing multiple pages, sources, or otherwise customizing citations a breeze. In-text citations, footnotes and endnotes are all supported.
Additional documentation: http://www.zotero.org/support/word_processor_plugin_installation_for_zotero_2.1