Dyfyniad APA
Hill, J. W., & Hill, C. S. (1988). Chemistry for changing times (5th ed.). Macmillan.
Dyfyniad Arddull Chicago
Hill, John William, and Cynthia S. Hill. Chemistry for Changing Times. 5th ed. New York: Macmillan, 1988.
Dyfyniad MLA
Hill, John William, and Cynthia S. Hill. Chemistry for Changing Times. 5th ed. Macmillan, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.