APA

National Cancer Institute (U.S.), . (1974). Carcinoembryonic antigen and blood group substances in carcinomas of the stomach and colon. [Washington, D.C: .

Chicago

National Cancer Institute (U.S.), . 1974. Carcinoembryonic antigen and blood group substances in carcinomas of the stomach and colon. [Washington, D.C: .

Harvard

National Cancer Institute (U.S.), . (1974). Carcinoembryonic antigen and blood group substances in carcinomas of the stomach and colon. [Washington, D.C: .

MLA

National Cancer Institute (U.S.), . Carcinoembryonic antigen and blood group substances in carcinomas of the stomach and colon. [Washington, D.C: . 1974.