The following sources will provide you with the basics in using APA format.
APA Formatting and Style Guide from Purdue's Online Writing Lab. Includes a section on citing electronic resources.
APA Style Essentials from Douglas Degelman, Ph.D., and Martin Lorenzo Harris, Ph.D., Vanguard University of Southern California. Authors include details about formatting such as spacing, tabs, and a downloadable template for Microsoft Word. They have also linked a sample paper and a sample proposal.
APA Style Tips from the APA includes information about writing without bias and citing electronic resources. Be sure to look at the sidebar as well as the page section titled Style Topics.