APA (7th ed.) Zitazioa
Gill, P. (1987). A textbook of machine drawing (11th ed.). Katson.
Chicago Style (17th ed.) Zitazioa
Gill, P.S. A Textbook of Machine Drawing. 11th ed. Delhi: Katson, 1987.
MLA (9th ed.) Zitazioa
Gill, P.S. A Textbook of Machine Drawing. 11th ed. Katson, 1987.
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