Plotnik, R. (1999). Introduction to psychology (5th ed.). An International Thomson Publishing Company.
Dyfyniad Arddull ChicagoPlotnik, Rod. Introduction to Psychology. 5th ed. London: An International Thomson Publishing Company, 1999.
Dyfyniad MLAPlotnik, Rod. Introduction to Psychology. 5th ed. An International Thomson Publishing Company, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.