Dyfyniad APA

Vinacke, W. E. (1952). The psychology of thinking. McGraw-Hill.

Dyfyniad Arddull Chicago

Vinacke, William Edgar. The Psychology of Thinking. New York: McGraw-Hill, 1952.

Dyfyniad MLA

Vinacke, William Edgar. The Psychology of Thinking. McGraw-Hill, 1952.

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