From Purdue OWL, a sample paper that shows you ALL the details on how your finished paper should look. NOTE: Sometimes your professor may make exceptions to the paper format (e.g. You don't need to include an abstract page.) so review your course syllabus and/or your assignment and ASK YOUR PROFESSOR if you are not sure.
It's difficult to find a better source of APA format than Purdue University's Online Writing Lab, aka Purdue OWL. Recommended by professors, researchers, and librarians, it is well-organized and will get you acquainted with everything APA. It also has a guide for MLA so make sure you are on the correct guide!