Citace podle APA

Willis, R. D., Van Hartesveldt, C., Loken, K. K., & Hall, D. C. (1974). Motivation in concurrent variable-interval schedules with food and water reinforcers.

Styl Chicago

Willis, Richard D., Carol Van Hartesveldt, Kristen K. Loken, a Deborah C. Hall. Motivation in Concurrent Variable-interval Schedules With Food and Water Reinforcers. 1974.

Citace podle MLA

Willis, Richard D., Carol Van Hartesveldt, Kristen K. Loken, a Deborah C. Hall. Motivation in Concurrent Variable-interval Schedules With Food and Water Reinforcers. 1974.

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