Dyfyniad APA

Bigner, J. J. (1983). Human development: A life-span approach. Mac millan publishing Co.

Dyfyniad Arddull Chicago

Bigner, Jerry J. Human Development: A Life-span Approach. New York: Mac millan publishing Co, 1983.

Dyfyniad MLA

Bigner, Jerry J. Human Development: A Life-span Approach. Mac millan publishing Co, 1983.

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