Não informado. (1906). Engineering and contracting. Engineering and Contracting Publishing.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Engineering and Contracting. Chicago, Ill: Engineering and Contracting Publishing, 1906.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Engineering and Contracting. Engineering and Contracting Publishing, 1906.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.