Dyfyniad APA

Holderness, A., & Lambert, J. (1987). A new certificate chemistry (6th ed.). Heinemann Educational..

Dyfyniad Arddull Chicago

Holderness, A., and John Lambert. A New Certificate Chemistry. 6th ed. Oxford: Heinemann Educational., 1987.

Dyfyniad MLA

Holderness, A., and John Lambert. A New Certificate Chemistry. 6th ed. Heinemann Educational., 1987.

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