World Health Organisation. (1988). WHO Expert Committee on Biological Standardization. World Health Organisation.
استشهاد بنمط شيكاغوWorld Health Organisation. WHO Expert Committee on Biological Standardization. Geneva: World Health Organisation, 1988.
MLA استشهادWorld Health Organisation. WHO Expert Committee on Biological Standardization. World Health Organisation, 1988.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.