APA استشهاد

Sommer, A. (1995). Vitamin A Deficiency and Its Consequnces: A Field Guide to Detection and Control (3rd.). World Health Organisation.

استشهاد بنمط شيكاغو

Sommer, Alfred. Vitamin A Deficiency and Its Consequnces: A Field Guide to Detection and Control. 3rd. Geneva: World Health Organisation, 1995.

MLA استشهاد

Sommer, Alfred. Vitamin A Deficiency and Its Consequnces: A Field Guide to Detection and Control. 3rd. World Health Organisation, 1995.