Dyfyniad APA

(1968). International encyclopedia of the social sciences. Volume 9, 10. Collier - Macmillan Publishers.

Dyfyniad Arddull Chicago

International Encyclopedia of the Social Sciences. Volume 9, 10. New York: Collier - Macmillan Publishers, 1968.

Dyfyniad MLA

International Encyclopedia of the Social Sciences. Volume 9, 10. Collier - Macmillan Publishers, 1968.

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