APA

National Cancer Institute (U.S.), . (1973). Differential effect of immunosuppression on induction of nuervous [sic] system and bladder tumors by N-methyl N-nitrosourcea. [Washington, D.C: .

Chicago

National Cancer Institute (U.S.), . 1973. Differential effect of immunosuppression on induction of nuervous [sic] system and bladder tumors by N-methyl N-nitrosourcea. [Washington, D.C: .

Harvard

National Cancer Institute (U.S.), . (1973). Differential effect of immunosuppression on induction of nuervous [sic] system and bladder tumors by N-methyl N-nitrosourcea. [Washington, D.C: .

MLA

National Cancer Institute (U.S.), . Differential effect of immunosuppression on induction of nuervous [sic] system and bladder tumors by N-methyl N-nitrosourcea. [Washington, D.C: . 1973.