Dyfyniad APA

World Health Organization. (1988). World directory of medical schools. World Health Organisation.

Dyfyniad Arddull Chicago

World Health Organization. World Directory of Medical Schools. Geneva: World Health Organisation, 1988.

Dyfyniad MLA

World Health Organization. World Directory of Medical Schools. World Health Organisation, 1988.

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