National League for Nursing. Research and Studies Service, National League for Nursing. Division of Research, National League for Nursing. Division of Public Policy and Research, & National League for Nursing. Research and Development. (1967). State-approved schools of nursing, L.P.N./L.V.N. National League for Nursing, Research and Studies Service.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)National League for Nursing. Research and Studies Service, National League for Nursing. Division of Research, National League for Nursing. Division of Public Policy and Research, và National League for Nursing. Research and Development. State-approved Schools of Nursing, L.P.N./L.V.N. New York, N.Y.: National League for Nursing, Research and Studies Service, 1967.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)National League for Nursing. Research and Studies Service, et al. State-approved Schools of Nursing, L.P.N./L.V.N. National League for Nursing, Research and Studies Service, 1967.