Dyfyniad APA

(1969). Artist's proof. New York: Pratt Graphics Center.

Dyfyniad Arddull Chicago

Artist's Proof. New York: Pratt Graphics Center, 1969.

Dyfyniad MLA

Artist's Proof. New York: Pratt Graphics Center, 1969.

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