Search the online version of the Chicago Manual of Style. The 17th are available using the link below.
While many academic disciples you will encounter as a student tend to use the APA citation style, the field of History most often uses Chicago style citation. Be sure to talk with your professor and/or syllabus to see what kind of citation style you should use. The links below provide information regarding the Chicago Style; however, many of them (especially the Purdue University On-line Writing Lab) also show how to cite in APA.
Purdue University On-line Writing Lab is a helpful resource that provides information on a variety of writing styles. Here you will find citation information, sample paper written in Chicago Style, notes about preparing a bibliography and more.
UNC Chapel Hill Citing Information provides information on spacing, in text citations, print sources and more using Chicago style.
The Writing Center @ University of Wisconsin Madison provide information with regards to formatting, footnoting and more using the Chicago style.
Turabian Citation Guide is a quick guide on proper Turabian style (Turabian style and Chicago style are essentially the same) citation offered by the Chicago University Press
If you need additional assistance with writing or citing please visit NCCU's Writing Studio.
The Writing Studio
102 Taylor Education Building
Phone 919-530-6035
Hours
Monday—Thursday 9 AM - 5 PM
Fridays 10 AM to 2 PM
The Chicago Manual of Style by 
A Manual for Writers of Research Papers, Theses, and Dissertations by 