Não informado. (1934). Highways, Bridges and Engineering Works. IPC Building and Contract Journals.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Highways, Bridges and Engineering Works. London: IPC Building and Contract Journals, 1934.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Highways, Bridges and Engineering Works. IPC Building and Contract Journals, 1934.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.