Cita APA (7th ed.)
Duggal, S. K. (2006). Surveying (2nd ed.). Tata McGraw-Hill.
Cita Chicago (17th ed.)
Duggal, S. K. Surveying. 2nd ed. New Delhi: Tata McGraw-Hill, 2006.
Cita MLA (9th ed.)
Duggal, S. K. Surveying. 2nd ed. Tata McGraw-Hill, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.