Dyfyniad APA

Harman, D. (2001). Thinkwell's chemistry. New York: Thinkwell.

Dyfyniad Arddull Chicago

Harman, Dean. Thinkwell's Chemistry. New York: Thinkwell, 2001.

Dyfyniad MLA

Harman, Dean. Thinkwell's Chemistry. New York: Thinkwell, 2001.

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