Dyfyniad APA

Northern, J. L., & Downs, M. (1974). Hearing in Children. Lippincott Williams & Wilkins.

Dyfyniad Arddull Chicago

Northern, Jerry L., and Marion Downs. Hearing in Children. Lippincott Williams & Wilkins, 1974.

Dyfyniad MLA

Northern, Jerry L., and Marion Downs. Hearing in Children. Lippincott Williams & Wilkins, 1974.

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