APA

Marshall E. D., Moses E. B. & National Institutes of Health (U.S.). (1971). LPNs, 1967 inventory of licensed practical nurses. [Washington, D.C: .

Chicago

Marshall Eleanor D, Moses Evelyn B and National Institutes of Health (U.S.). 1971. LPNs, 1967 inventory of licensed practical nurses. [Washington, D.C: .

Harvard

Marshall E. D., Moses E. B. and National Institutes of Health (U.S.). (1971). LPNs, 1967 inventory of licensed practical nurses. [Washington, D.C: .

MLA

Marshall Eleanor D, Moses Evelyn B and National Institutes of Health (U.S.). LPNs, 1967 inventory of licensed practical nurses. [Washington, D.C: . 1971.