Dyfyniad APA

Chang, R., & Tikkanen, W. (1988). The Top Fifty Industrial Chemicals. New York: Random House.

Dyfyniad Arddull Chicago

Chang, Raymond, và Wayne Tikkanen. The Top Fifty Industrial Chemicals. New York: Random House, 1988.

Dyfyniad MLA

Chang, Raymond, và Wayne Tikkanen. The Top Fifty Industrial Chemicals. New York: Random House, 1988.

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