Sharma, A. (2017). General studies for civil services preliminary examination GS paper-II (UPSC). McGraw hill Education.
Цитирование в стиле Чикаго (17-е изд.)Sharma, Arun. General Studies for Civil Services Preliminary Examination GS Paper-II (UPSC). Chennai: McGraw hill Education, 2017.
Цитирование MLA (9-е изд.)Sharma, Arun. General Studies for Civil Services Preliminary Examination GS Paper-II (UPSC). McGraw hill Education, 2017.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.