APA

National Cancer Institute (U.S.), . (1971). Susceptibility to leukemia, immunologic factors in Down's Syndrome. [Washington, D.C: .

Chicago

National Cancer Institute (U.S.), . 1971. Susceptibility to leukemia, immunologic factors in Down's Syndrome. [Washington, D.C: .

Harvard

National Cancer Institute (U.S.), . (1971). Susceptibility to leukemia, immunologic factors in Down's Syndrome. [Washington, D.C: .

MLA

National Cancer Institute (U.S.), . Susceptibility to leukemia, immunologic factors in Down's Syndrome. [Washington, D.C: . 1971.