Dyfyniad APA

Spencer, P. R. (1954). Progress on reading books. Chicago: Lyons and Carnahan.

Dyfyniad Arddull Chicago

Spencer, Paul R. Progress On Reading Books. Chicago: Lyons and Carnahan, 1954.

Dyfyniad MLA

Spencer, Paul R. Progress On Reading Books. Chicago: Lyons and Carnahan, 1954.

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