Dyfyniad APA

Plutchik, R. (1975). Programmed learning aid for emotion. Learning Systems.

Dyfyniad Arddull Chicago

Plutchik, Robert. Programmed Learning Aid for Emotion. Homewood, Ill: Learning Systems, 1975.

Dyfyniad MLA

Plutchik, Robert. Programmed Learning Aid for Emotion. Learning Systems, 1975.

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