Παραπομπή APA

Duggal, S. (2007). Surveying: Vol.1 (2nd.). Tata McGraw-Hill.

Παραπομπή Chicago Style

Duggal, S.K. Surveying: Vol.1. 2nd. New Delhi: Tata McGraw-Hill, 2007.

Παραπομπή MLA

Duggal, S.K. Surveying: Vol.1. 2nd. Tata McGraw-Hill, 2007.