Sommer, A. (1995). Vitamin A Deficiency and Its Consequnces: A Field Guide to Detection and Control (3rd.). World Health Organisation.
শিকাগো স্টাইলে সাইটেশনSommer, Alfred. Vitamin A Deficiency and Its Consequnces: A Field Guide to Detection and Control. 3rd. Geneva: World Health Organisation, 1995.
এমএলএ সাইটেশনSommer, Alfred. Vitamin A Deficiency and Its Consequnces: A Field Guide to Detection and Control. 3rd. World Health Organisation, 1995.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.