Culbertson, J. A., Henson, E. C., & Morrison, R. (1974). Performance objectives for school principals: Concepts and instruments. McCutchan Pub. Corp..
Citace podle Chicago (17th ed.)Culbertson, Jack A., E. Curtis Henson, a Ruel Morrison. Performance Objectives for School Principals: Concepts and Instruments. Berkeley, Calif.: McCutchan Pub. Corp., 1974.
Citace podle MLA (8th ed.)Culbertson, Jack A., et al. Performance Objectives for School Principals: Concepts and Instruments. McCutchan Pub. Corp., 1974.
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