APA
Khurmi RS & Gupta J., .A text book of thermal engineering. New Delhi: Sultan Chand & Sons.
Chicago
Khurmi RS & Gupta J.K, .A text book of thermal engineering. New Delhi: Sultan Chand & Sons.
Harvard
Khurmi RS & Gupta J., .A text book of thermal engineering. New Delhi: Sultan Chand & Sons.
MLA
Khurmi RS & Gupta J.K, .New Delhi: Sultan Chand & Sons. .