APA

National Institutes of Health (U.S.), . (1973). Division of Dental Health directory. [Washington, D.C: .

Chicago

National Institutes of Health (U.S.), . 1973. Division of Dental Health directory. [Washington, D.C: .

Harvard

National Institutes of Health (U.S.), . (1973). Division of Dental Health directory. [Washington, D.C: .

MLA

National Institutes of Health (U.S.), . Division of Dental Health directory. [Washington, D.C: . 1973.