Organization for Economic Cooperation and Development. Steering Committee for Road Research. (1972). Road research publications, 1968-1972: Construction, safety, traffic. Organisation for Economic Co-operation and Development.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিOrganization for Economic Cooperation and Development. Steering Committee for Road Research. Road Research Publications, 1968-1972: Construction, Safety, Traffic. [Paris]: Organisation for Economic Co-operation and Development, 1972.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিOrganization for Economic Cooperation and Development. Steering Committee for Road Research. Road Research Publications, 1968-1972: Construction, Safety, Traffic. Organisation for Economic Co-operation and Development, 1972.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.