APA (7th ed.) Citation

Welch, C. E., & Hedberg, S. E. (1975). Polypoid lesions of the gastrointestinal tract (2. ed.). Saunders.

Chicago Style (17th ed.) Citation

Welch, Claude E., and Stephen E. Hedberg. Polypoid Lesions of the Gastrointestinal Tract. 2. ed. Philadelphia [u.a.]: Saunders, 1975.

MLA (9th ed.) Citation

Welch, Claude E., and Stephen E. Hedberg. Polypoid Lesions of the Gastrointestinal Tract. 2. ed. Saunders, 1975.