Kuhlen, R. G., & Thompson, G. G. (1970). Psychological studies of human development (3rd.ed.). Appleton-century-crofts.
Dyfyniad Arddull ChicagoKuhlen, Raymond G., and George G. Thompson. Psychological Studies of Human Development. 3rd.ed. New York: Appleton-century-crofts, 1970.
Dyfyniad MLAKuhlen, Raymond G., and George G. Thompson. Psychological Studies of Human Development. 3rd.ed. Appleton-century-crofts, 1970.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.