Dyfyniad APA

Wolpert, L. (2007). Principles of development (3rd.). Oxford University Press.

Dyfyniad Arddull Chicago

Wolpert, Lewis. Principles of Development. 3rd. Oxford: Oxford University Press, 2007.

Dyfyniad MLA

Wolpert, Lewis. Principles of Development. 3rd. Oxford University Press, 2007.

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