Dear Rachel,
Here is an APA Tip Sheet we recommend for all courses using APA at Penn Foster, we introduce this in Biology but it is appropriate for all the Vet Tech courses that use APA:
https://drive.google.com/file/d/0B3SCU-9gxu0wa1hqR251Ri05Nms/view?usp=sharing
Additionally, as the student above mentioned, we recommend looking at Purdue's OWL site:
Purdue OWL: APA Formatting and Style Guide
Sincere;y,
Betsy Reichart
Instructor and Librarian