Cita APA (7a ed.)
Gill, P. (1987). A textbook of machine drawing (11th ed.). Katson.
Cita Chicago Style (17a ed.)
Gill, P.S. A Textbook of Machine Drawing. 11th ed. Delhi: Katson, 1987.
Cita MLA (9a ed.)
Gill, P.S. A Textbook of Machine Drawing. 11th ed. Katson, 1987.
Precaución: Estas citas no son 100% exactas.