Gazda, G. M. (1991). Human relations development: A manual for educators (4th ed.). Allyn and Bacon.
Cita Chicago (17th ed.)Gazda, George Michael. Human Relations Development: A Manual for Educators. 4th ed. Boston: Allyn and Bacon, 1991.
Cita MLA (9th ed.)Gazda, George Michael. Human Relations Development: A Manual for Educators. 4th ed. Allyn and Bacon, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.