APA
Gill P., . (1997). A Text Book of Machine Drawing. : Delhi S.K. Katria& Sons.
Chicago
Gill P.S, . 1997. A Text Book of Machine Drawing. : Delhi S.K. Katria& Sons.
Harvard
Gill P., . (1997). A Text Book of Machine Drawing. : Delhi S.K. Katria& Sons.
MLA
Gill P.S, . A Text Book of Machine Drawing. : Delhi S.K. Katria& Sons. 1997.