Dyfyniad APA

Cratty, B. J. (1968). Psychology and physical activity. Prentice-Hall.

Dyfyniad Arddull Chicago

Cratty, Bryant J. Psychology and Physical Activity. New Jersey: Prentice-Hall, 1968.

Dyfyniad MLA

Cratty, Bryant J. Psychology and Physical Activity. Prentice-Hall, 1968.

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