Ferster, C. B., Culbertson, S., & Boren, M. C. P. (1975). Behavior principles (2nd ed.). Pprentice-Hall.
Lua i Stíl Chicago (17ú heag.)Ferster, Charles B., Stuart Culbertson, agus Mary Carol Perrott Boren. Behavior Principles. 2nd ed. Englewood Cliffs: Pprentice-Hall, 1975.
Lua MLA (9ú heag.)Ferster, Charles B., et al. Behavior Principles. 2nd ed. Pprentice-Hall, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.