Cita APA (7th ed.)

Ferster, C. B., & Skinner, B. F. (1957). Schedules of reinforcement. Appleton-Century-Crofts.

Cita Chicago (17th ed.)

Ferster, C. B., i Burrhus Frederic Skinner. Schedules of Reinforcement. New York: Appleton-Century-Crofts, 1957.

Cita MLA (9th ed.)

Ferster, C. B., i Burrhus Frederic Skinner. Schedules of Reinforcement. Appleton-Century-Crofts, 1957.