Dyfyniad APA

Shull, R. L., Guilkey, M., & Witty, W. (1972). Changing the response unit from a single peck to a fixed number of pecks in fixed-interval schedules.

Dyfyniad Arddull Chicago

Shull, Richard L., Marilyn Guilkey, and William Witty. Changing the Response Unit From a Single Peck to a Fixed Number of Pecks in Fixed-interval Schedules. 1972.

Dyfyniad MLA

Shull, Richard L., Marilyn Guilkey, and William Witty. Changing the Response Unit From a Single Peck to a Fixed Number of Pecks in Fixed-interval Schedules. 1972.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.