Consult the Library's web page on Writing & Citing for general help on essay writing, avoiding plagiarism, and citing your sources. Geography scholars often use either Chicago style or APA style, but always consult with your professor or syllabus. Check out quick citation management tools including Citation Machine, bibme, APA Referencing Generator and EasyBib. Free downloadable citation management software in available to create bibliographies and in-text citations. The most popular are Mendeley and Zotero. A complete list may be found here.
Zotero is fast becoming one of the most used, free, online citation management tool among many new products! Register for an online account, install Zotero as a free standalone application, select different styles to import, consult this UNC Library video, add a Word plugin to allow you to do intext citing add the Zotfile plugin to help manage your PDFs, watch a video on Working with PDFs, consult this NorthWestern Library guide for tips, or watch basic Zotero how to videos.
The most popular research and citation web resource is Purdue Owl that helps with research, APA, MLA, and Chicago styles.