Dyfyniad APA

World Health Organization. (1989). WORLD health organization: : publications catalogue 1948- 1989. World Health Organization.

Dyfyniad Arddull Chicago

World Health Organization. WORLD Health Organization: : Publications Catalogue 1948- 1989. World Health Organization, 1989.

Dyfyniad MLA

World Health Organization. WORLD Health Organization: : Publications Catalogue 1948- 1989. World Health Organization, 1989.

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