Venugopal, K. (2004). Engineering drawing and graphics (Fifth edition.). New Age International.
Cita Chicago (17th ed.)Venugopal, K. Engineering Drawing and Graphics. Fifth edition. New Delhi: New Age International, 2004.
Cita MLA (8th ed.)Venugopal, K. Engineering Drawing and Graphics. Fifth edition. New Age International, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.