Dyfyniad APA

(1990). The Best Of Psychology To Day. McGraw-Hill.

Dyfyniad Arddull Chicago

The Best Of Psychology To Day. McGraw-Hill, 1990.

Dyfyniad MLA

The Best Of Psychology To Day. McGraw-Hill, 1990.

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