APA

National Cancer Institute (U.S.), . (19). Alpha-I-Fetoprotein: serologic marker of human hepatoma and embryonal carcinoma. [Washington, D.C: .

Chicago

National Cancer Institute (U.S.), . 19. Alpha-I-Fetoprotein: serologic marker of human hepatoma and embryonal carcinoma. [Washington, D.C: .

Harvard

National Cancer Institute (U.S.), . (19). Alpha-I-Fetoprotein: serologic marker of human hepatoma and embryonal carcinoma. [Washington, D.C: .

MLA

National Cancer Institute (U.S.), . Alpha-I-Fetoprotein: serologic marker of human hepatoma and embryonal carcinoma. [Washington, D.C: . 19.