Gupta, A. Billion is enough: India's population problem a way out. 2001.
استشهاد بنمط شيكاغوGupta, Ashok. Billion Is Enough: India's Population Problem a Way Out. New Delhi: 2001.
MLA استشهادGupta, Ashok. Billion Is Enough: India's Population Problem a Way Out. 2001.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.