Dyfyniad APA

Birk, J. P. (1994). Chemistry (Instructor's annotated ed.). Houghton Mifflin.

Dyfyniad Arddull Chicago

Birk, James P. Chemistry. Instructor's annotated ed. Boston: Houghton Mifflin, 1994.

Dyfyniad MLA

Birk, James P. Chemistry. Instructor's annotated ed. Houghton Mifflin, 1994.

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