Dyfyniad APA

(1980). Progress tests for the developmentally disabled: An evaluation / John Doucette, Ruth Freedman.

Dyfyniad Arddull Chicago

Progress Tests for the Developmentally Disabled: An Evaluation / John Doucette, Ruth Freedman. 1980.

Dyfyniad MLA

Progress Tests for the Developmentally Disabled: An Evaluation / John Doucette, Ruth Freedman. 1980.

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