Dyfyniad APA

Sekuler, R., & Blake, R. (1990). Perception (Second edition.). McGraw-Hill Publishing Company.

Dyfyniad Arddull Chicago

Sekuler, Robert, and Randolph Blake. Perception. Second edition. New York: McGraw-Hill Publishing Company, 1990.

Dyfyniad MLA

Sekuler, Robert, and Randolph Blake. Perception. Second edition. McGraw-Hill Publishing Company, 1990.

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