United States. General Accounting Office. (1978). Rail crossing safety - at what price?: Report to the Congress. General Accounting Office.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিUnited States. General Accounting Office. Rail Crossing Safety - at What Price?: Report to the Congress. Washington: General Accounting Office, 1978.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিUnited States. General Accounting Office. Rail Crossing Safety - at What Price?: Report to the Congress. General Accounting Office, 1978.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.