APA način citiranja

Pullan, R. D. (1996). Colonic mucus, smoking and ulcerative colitis. Royal College of Surgeons of England.

Čikaški stil citiranja

Pullan, R. D. Colonic Mucus, Smoking and Ulcerative Colitis. Royal College of Surgeons of England, 1996.

MLA način citiranja

Pullan, R. D. Colonic Mucus, Smoking and Ulcerative Colitis. Royal College of Surgeons of England, 1996.

Upozorenje: Ovi citati možda nisu uvijek 100% točni.