Ferster, C. B., Culbertson, S., & Boren, M. C. P. (1975). Behavior principles (2a. ed.). Prentice-Hall.
Cita Chicago (17th ed.)Ferster, Charles B., Stuart Culbertson, i Mary Carol Perrott Boren. Behavior Principles. 2a. ed. Englewood Cliffs: Prentice-Hall, 1975.
Cita MLA (9th ed.)Ferster, Charles B., et al. Behavior Principles. 2a. ed. Prentice-Hall, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.