APA (7th ed.) Citation

Penney, D. G. (1996). A USMLE step 1 review physiology (9th edition.). Appleton & Lange.

Chicago Style (17th ed.) Citation

Penney, David G. A USMLE Step 1 Review Physiology. 9th edition. Stamford: Appleton & Lange, 1996.

MLA (8th ed.) Citation

Penney, David G. A USMLE Step 1 Review Physiology. 9th edition. Appleton & Lange, 1996.

Warning: These citations may not always be 100% accurate.