Dyfyniad APA

Joesten, M. D., & Johnston, D. O. (1991). World of Chemistry. Saunders College.

Dyfyniad Arddull Chicago

Joesten, Melvin D., and David O. Johnston. World of Chemistry. Philadelphia: Saunders College, 1991.

Dyfyniad MLA

Joesten, Melvin D., and David O. Johnston. World of Chemistry. Saunders College, 1991.

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