APA
Dhawan D. R., .A Text Book of Engineering Drawing. New Delhi: Sultan Chand & Sons.
Chicago
Dhawan Dr R.K, .A Text Book of Engineering Drawing. New Delhi: Sultan Chand & Sons.
Harvard
Dhawan D. R., .A Text Book of Engineering Drawing. New Delhi: Sultan Chand & Sons.
MLA
Dhawan Dr R.K, .New Delhi: Sultan Chand & Sons. .