Dyfyniad APA

(2007). World health statistics 2007. World Health Orgnization.

Dyfyniad Arddull Chicago

World Health Statistics 2007. Paris: World Health Orgnization, 2007.

Dyfyniad MLA

World Health Statistics 2007. World Health Orgnization, 2007.

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