Higgins, J. M., & Crummer, R. M. (1982). A manual of student activities in human relations: Cases, exercises and readings. Random House.
Παραπομπή σε μορφή Chicago (17η εκδ.)Higgins, James M., και Roy M. Crummer. A Manual of Student Activities in Human Relations: Cases, Exercises and Readings. New York: Random House, 1982.
Παραπομπή σε μορφή MLA (8th εκδ.)Higgins, James M., και Roy M. Crummer. A Manual of Student Activities in Human Relations: Cases, Exercises and Readings. Random House, 1982.
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