एपीए उद्धरण

Surender Singh. (2004). Geography for the UPSC civil services preliminary examination. Tata McGraw-Hill.

शिकागो स्टाइल उद्धरण

Surender Singh. Geography for the UPSC Civil Services Preliminary Examination. New Delhi: Tata McGraw-Hill, 2004.

एमएलए उद्धरण

Surender Singh. Geography for the UPSC Civil Services Preliminary Examination. Tata McGraw-Hill, 2004.