Dyfyniad APA

Ripple, R. E., Biehler, R. F., & Jaquish, G. A. (1982). Human development. Houghton Mifflin.

Dyfyniad Arddull Chicago

Ripple, Richard E., Robert F. Biehler, and Gail A. Jaquish. Human Development. Boston: Houghton Mifflin, 1982.

Dyfyniad MLA

Ripple, Richard E., et al. Human Development. Houghton Mifflin, 1982.

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