Dyfyniad APA

Sekuler, R., & Blake, R. (2002). Perception (4th ed.). McGraw-Hill.

Dyfyniad Arddull Chicago

Sekuler, Robert, and Randolph Blake. Perception. 4th ed. Boston: McGraw-Hill, 2002.

Dyfyniad MLA

Sekuler, Robert, and Randolph Blake. Perception. 4th ed. McGraw-Hill, 2002.

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