APA

National Cancer Institute (U.S.), . (1973). Multilevel analysis of NCI research grants by scientific category, fiscal year 1972. [Washington, D.C: .

Chicago

National Cancer Institute (U.S.), . 1973. Multilevel analysis of NCI research grants by scientific category, fiscal year 1972. [Washington, D.C: .

Harvard

National Cancer Institute (U.S.), . (1973). Multilevel analysis of NCI research grants by scientific category, fiscal year 1972. [Washington, D.C: .

MLA

National Cancer Institute (U.S.), . Multilevel analysis of NCI research grants by scientific category, fiscal year 1972. [Washington, D.C: . 1973.