These materials represent what I consider the most relevant and up-to-date general texts for this class. These books are on reserve so that many students can use them during the semester. You should utilize these books FIRST whenever possible, before heading to the stacks. All reserve books can be checked out overnight.
Citing your sources properly -- yes, even the images you use from the Internet -- is important and required. Generally, History courses require that you use Chicago citation style: footnotes and bibliography.
You should already own a copy of Mary L. Rampolla's A Pocket Guide to Writing in History. You can find all you need to know about formatting your footnotes and bibliography here, as well as helpful tips for evaluating sources and writing history papers. The inside of the back cover is a quick directory to documentation models. Each model gives you the format for your footnote (labeled “N”) and your bibliography entry (labeled “B”).
If you would like additional information, Purdue University's OWL Writing Lab Citation resources are the best ones out there on the web.