Não informado. (1929). Machine Design: As it affects engineering, production, sales. Penton Publishing.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Machine Design: As It Affects Engineering, Production, Sales. Cleveland, Ohio: Penton Publishing, 1929.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Machine Design: As It Affects Engineering, Production, Sales. Penton Publishing, 1929.
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