There are many different ways to properly cite information that you use in assignments.
Most instructors prefer a specific style guide over another.
It is usually up to the instructor to determine which style to follow. If they choose APA make sure you follow that guide. If they do not choose a style for you, the most important thing to remember is to be consistent. If you begin an assignment in APA style, continue it throughout your paper. Each style guide mandates what order the citation information should be placed in the bibliography or reference list.