Nigeria & Rapson, R. N. (1957). Report of the grading teams of the former Nigerian Railway and Nigeria Marine: And notification of the conclusions of the Government of the Federation thereon. Federal Government Printer.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNigeria এবং R. N. Rapson. Report of the Grading Teams of the Former Nigerian Railway and Nigeria Marine: And Notification of the Conclusions of the Government of the Federation Thereon. Lagos: Federal Government Printer, 1957.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNigeria এবং R. N. Rapson. Report of the Grading Teams of the Former Nigerian Railway and Nigeria Marine: And Notification of the Conclusions of the Government of the Federation Thereon. Federal Government Printer, 1957.
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