World Health Organization. (1988). World directory of medical schools. World Health Organisation.
استشهاد بنمط شيكاغوWorld Health Organization. World Directory of Medical Schools. Geneva: World Health Organisation, 1988.
MLA استشهادWorld Health Organization. World Directory of Medical Schools. World Health Organisation, 1988.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.