APA

National Cancer Institute (U.S.), . (1974). Evidence against a direct carcinogenic effect of X-rays in vitro. [Washington, D.C: .

Chicago

National Cancer Institute (U.S.), . 1974. Evidence against a direct carcinogenic effect of X-rays in vitro. [Washington, D.C: .

Harvard

National Cancer Institute (U.S.), . (1974). Evidence against a direct carcinogenic effect of X-rays in vitro. [Washington, D.C: .

MLA

National Cancer Institute (U.S.), . Evidence against a direct carcinogenic effect of X-rays in vitro. [Washington, D.C: . 1974.