Παραπομπή APA

Held, R., & Richards, W. (1972). Perception: Mechanisms and models. San Francisco: W. H. Freeman and Company.

Παραπομπή Chicago Style

Held, Richard, and Whitman Richards. Perception: Mechanisms and Models. San Francisco: W. H. Freeman and Company, 1972.

Παραπομπή MLA

Held, Richard, and Whitman Richards. Perception: Mechanisms and Models. San Francisco: W. H. Freeman and Company, 1972.

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