Dyfyniad APA

Ratcliff, B. (2008). AS Level and A Level: Chemistry. Cambridge University Press.

Dyfyniad Arddull Chicago

Ratcliff, Brian. AS Level and A Level: Chemistry. Cambridge University Press, 2008.

Dyfyniad MLA

Ratcliff, Brian. AS Level and A Level: Chemistry. Cambridge University Press, 2008.

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