Ubben, G. C., & Hughes, L. W. (1997). The principal: Creative leadership for effective schools (3rd ed.). Allyn & Bacon.
Citace podle Chicago (17th ed.)Ubben, Gerald C., a Larry W. Hughes. The Principal: Creative Leadership for Effective Schools. 3rd ed. Boston: Allyn & Bacon, 1997.
Citace podle MLA (9th ed.)Ubben, Gerald C., a Larry W. Hughes. The Principal: Creative Leadership for Effective Schools. 3rd ed. Allyn & Bacon, 1997.
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