Παραπομπή APA

Surender Singh. (2008). Geography: For the UPSC civil services preliminary examination (2nd.). Tata Mcgraw hill.

Παραπομπή Chicago Style

Surender Singh. Geography: For the UPSC Civil Services Preliminary Examination. 2nd. Newdelhi: Tata Mcgraw hill, 2008.

Παραπομπή MLA

Surender Singh. Geography: For the UPSC Civil Services Preliminary Examination. 2nd. Tata Mcgraw hill, 2008.