Publication Manual of the American Psychological Association by While this guide provides examples for many of the most common sources you may need to cite and attempts to represent variations within those sources, it is not comprehensive. If you need more help, you should refer to the APA style website, in particular pages linked here regarding the elements of reference list entries and what to do about missing reference information.
This series of brief videos from Humber Library provides an overview of how to identify reference components and create citations.
