APA (7th ed.) Citation

Ayala, C., MD, & Spellberg, B. (2003). Pathophysiology for the boards and wards: A review for USMLE step 1 (Fourth edition.). Blackwell Pub..

Chicago Style (17th ed.) Citation

Ayala, Carlos, MD, and Brad Spellberg. Pathophysiology for the Boards and Wards: A Review for USMLE Step 1. Fourth edition. Malden, Mass.: Blackwell Pub., 2003.

MLA (9th ed.) Citation

Ayala, Carlos, MD, and Brad Spellberg. Pathophysiology for the Boards and Wards: A Review for USMLE Step 1. Fourth edition. Blackwell Pub., 2003.