Aberle, W. H. G. (1978). Economic prospects for railways: Report of the thirty-ninth round table on Transport Economics, held in Paris on 19th and 20th October, 1977.. Paris: European Conference of Ministers of Transport.
শিকাগো স্টাইলে সাইটেশনAberle, W. Hamm G. Economic Prospects for Railways: Report of the Thirty-ninth Round Table On Transport Economics, Held in Paris On 19th and 20th October, 1977.. Paris: European Conference of Ministers of Transport, 1978.
এমএলএ সাইটেশনAberle, W. Hamm G. Economic Prospects for Railways: Report of the Thirty-ninth Round Table On Transport Economics, Held in Paris On 19th and 20th October, 1977.. Paris: European Conference of Ministers of Transport, 1978.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.