Dyfyniad APA

Dubois, J. H., & John, F. W. (1981). Plastics. Van Nostrand Reinhold Company.

Dyfyniad Arddull Chicago

Dubois, John Harry, and Frederick W. John. Plastics. New York: Van Nostrand Reinhold Company, 1981.

Dyfyniad MLA

Dubois, John Harry, and Frederick W. John. Plastics. Van Nostrand Reinhold Company, 1981.

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