National Research Council (U.S.). Highway Research Board. Committee on Communications & National Research Council (U.S.). Highway Research Board. Committee on Motorist Services. (1971). Communications and emergency services: 6 reports. Highway Research Board, National Research Council.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNational Research Council (U.S.). Highway Research Board. Committee on Communications এবং National Research Council (U.S.). Highway Research Board. Committee on Motorist Services. Communications and Emergency Services: 6 Reports. Washington, D.C: Highway Research Board, National Research Council, 1971.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিNational Research Council (U.S.). Highway Research Board. Committee on Communications এবং National Research Council (U.S.). Highway Research Board. Committee on Motorist Services. Communications and Emergency Services: 6 Reports. Highway Research Board, National Research Council, 1971.