APA (7th ed.) Citation
Gill, P. (1987). A textbook of machine drawing (11th ed.). Katson.
Chicago Style (17th ed.) Citation
Gill, P.S. A Textbook of Machine Drawing. 11th ed. Delhi: Katson, 1987.
MLA (9th ed.) Citation
Gill, P.S. A Textbook of Machine Drawing. 11th ed. Katson, 1987.
Warning: These citations may not always be 100% accurate.