APA

National Cancer Institute (U.S.), . (1975). Trytophanase of fecal flora as a possible factor in the etiology of colon cancer. [Washington, D.C: .

Chicago

National Cancer Institute (U.S.), . 1975. Trytophanase of fecal flora as a possible factor in the etiology of colon cancer. [Washington, D.C: .

Harvard

National Cancer Institute (U.S.), . (1975). Trytophanase of fecal flora as a possible factor in the etiology of colon cancer. [Washington, D.C: .

MLA

National Cancer Institute (U.S.), . Trytophanase of fecal flora as a possible factor in the etiology of colon cancer. [Washington, D.C: . 1975.