APA

National Cancer Institute (U.S.), . (1972). Preliminary studies of tolerance to contact sensitization in carcinogen-fed guidea [sic] pigs. [Washington, D.C: .

Chicago

National Cancer Institute (U.S.), . 1972. Preliminary studies of tolerance to contact sensitization in carcinogen-fed guidea [sic] pigs. [Washington, D.C: .

Harvard

National Cancer Institute (U.S.), . (1972). Preliminary studies of tolerance to contact sensitization in carcinogen-fed guidea [sic] pigs. [Washington, D.C: .

MLA

National Cancer Institute (U.S.), . Preliminary studies of tolerance to contact sensitization in carcinogen-fed guidea [sic] pigs. [Washington, D.C: . 1972.