Dyfyniad APA

Chinn, P. C., Drew, C. J., & Logan, D. R. (1975). Mental Retardation: A life cycle approach. Mosby.

Dyfyniad Arddull Chicago

Chinn, Philip C., Clifford J. Drew, and Don R. Logan. Mental Retardation: A Life Cycle Approach. Saint Louis: Mosby, 1975.

Dyfyniad MLA

Chinn, Philip C., et al. Mental Retardation: A Life Cycle Approach. Mosby, 1975.

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