Não informado. (2002). Journal of Transportation and Statistics. US Department of Transportation, Bureau of Transportation Statistics.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Journal of Transportation and Statistics. Washington: US Department of Transportation, Bureau of Transportation Statistics, 2002.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Journal of Transportation and Statistics. US Department of Transportation, Bureau of Transportation Statistics, 2002.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.