Dyfyniad APA

Hill, J. W., & Hill, C. S. (1992). Chemistry for changing times (6th ed.). Macmillan Pub. Co.

Dyfyniad Arddull Chicago

Hill, John William, and Cynthia S. Hill. Chemistry for Changing Times. 6th ed. New York: Macmillan Pub. Co, 1992.

Dyfyniad MLA

Hill, John William, and Cynthia S. Hill. Chemistry for Changing Times. 6th ed. Macmillan Pub. Co, 1992.

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