For an automated service to help format your citations, try:
Son of Citation Machine
from the Landmark Project. It is very easy to use and accurate.
This is a very comprehensive web page from Duke University Libraries entitled: Assembling a List of Works Cited in Your Paper.
I particularly like it because it includes examples for both the major formats of citable materials and the respective style manual citations
Citation Management Tools This guide includes information about citation management tools, or applications used to organize your references, generate bibliographies, and collaborate with others.
Citation Research How to find citation counts for your publications and how to find journal rankings such as impact factors.
Citation Styles Help with different citation styles including how to format citations. APA; MLA; Chicago; Turabian