Bigley, G. A., Porter, L. W., & Steers, R. M. (2003). Motivation and work behavior (7th ed.). McGraw-Hill/Irwin.
Lua i Stíl Chicago (17ú heag.)Bigley, Gregory A., Lyman W. Porter, agus Richard M. Steers. Motivation and Work Behavior. 7th ed. Boston: McGraw-Hill/Irwin, 2003.
Lua MLA (9ú heag.)Bigley, Gregory A., et al. Motivation and Work Behavior. 7th ed. McGraw-Hill/Irwin, 2003.
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