Dyfyniad APA

(1971). Circle: International survey of constructive art. Praeger Pub.

Dyfyniad Arddull Chicago

Circle: International Survey of Constructive Art. New York: Praeger Pub, 1971.

Dyfyniad MLA

Circle: International Survey of Constructive Art. Praeger Pub, 1971.

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