APA aipamena

Duggal, S. K. (2009). Design of steel structures (3rd ed.). Tata McGraw Hill.

Chicago Style aipamena

Duggal, S. K. Design of Steel Structures. 3rd ed. New Delhi: Tata McGraw Hill, 2009.

MLA aipamena

Duggal, S. K. Design of Steel Structures. 3rd ed. Tata McGraw Hill, 2009.