Singh, S. (2011). Geography for State Civil Services and other competitive examinations. Mc Graw Hill.
استشهاد بنمط شيكاغوSingh, Surender. Geography for State Civil Services and Other Competitive Examinations. New Delhi: Mc Graw Hill, 2011.
MLA استشهادSingh, Surender. Geography for State Civil Services and Other Competitive Examinations. Mc Graw Hill, 2011.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.