Dyfyniad APA

Dubois, J. H., & John, F. W. (1974). Plastics (5th ed.). Van Nostrand Reinhold Company.

Dyfyniad Arddull Chicago

Dubois, John Harry, and Frederick W. John. Plastics. 5th ed. New York: Van Nostrand Reinhold Company, 1974.

Dyfyniad MLA

Dubois, John Harry, and Frederick W. John. Plastics. 5th ed. Van Nostrand Reinhold Company, 1974.

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