APA (7th ed.) Citation

Netter, F. H., & Oppenheimer, E. Digestive system: Upper digestive tract.

Chicago Style (17th ed.) Citation

Netter, Frank H., and Ernst Oppenheimer. Digestive System: Upper Digestive Tract.

MLA (8th ed.) Citation

Netter, Frank H., and Ernst Oppenheimer. Digestive System: Upper Digestive Tract.

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