Dyfyniad APA

Unesco. Principal Regional Office for Asia and the Pacific. (1989). Resources for chemistry learning and teaching. Unesco.

Dyfyniad Arddull Chicago

Unesco. Principal Regional Office for Asia and the Pacific. Resources for Chemistry Learning and Teaching. Bangkok: Unesco, 1989.

Dyfyniad MLA

Unesco. Principal Regional Office for Asia and the Pacific. Resources for Chemistry Learning and Teaching. Unesco, 1989.

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