APA استشهاد

Singh,Ashok Kumar. (2008). Science & Technology for civil services Examinations. Tata McGraw-Hill.

استشهاد بنمط شيكاغو

Singh,Ashok Kumar. Science & Technology for Civil Services Examinations. New Delhi: Tata McGraw-Hill, 2008.

MLA استشهاد

Singh,Ashok Kumar. Science & Technology for Civil Services Examinations. Tata McGraw-Hill, 2008.