Dyfyniad APA

Inhelder, B., & translated by . usan Wedwood. (1974). Learning and the development of cognition. Harvard University Press.

Dyfyniad Arddull Chicago

Inhelder, Barbel, and translated by . usan Wedwood. Learning and the Development of Cognition. Cambridge, Mass: Harvard University Press, 1974.

Dyfyniad MLA

Inhelder, Barbel, and translated by . usan Wedwood. Learning and the Development of Cognition. Harvard University Press, 1974.

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