Purdue University's Online Writing Lab (OWL) has a great website with information about citing and writing in both MLA and APA styles.
Zotero can help you to gather organize and cite your sources.
Download Zotero here https://www.zotero.org/download/
Download the Word plugin for Zotero here https://www.zotero.org/support/word_processor_plugin_installation
We suggest you use Firefox as your browser with using Zotero.