Dyfyniad APA

Robert S Felman. (2011). Deveopment Across the Life Span (6th.ed.). Pretice Hall.

Dyfyniad Arddull Chicago

Robert S Felman. Deveopment Across the Life Span. 6th.ed. Newyork: Pretice Hall, 2011.

Dyfyniad MLA

Robert S Felman. Deveopment Across the Life Span. 6th.ed. Pretice Hall, 2011.

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