Transport Research Laboratory. (1994). International Road Maintenance Handbook: Practical guidelines for rural road maintenance ; maintenance of roadside areas and drainage. Transport Research Laboratory.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিTransport Research Laboratory. International Road Maintenance Handbook: Practical Guidelines for Rural Road Maintenance ; Maintenance of Roadside Areas and Drainage. United Kingdom: Transport Research Laboratory, 1994.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিTransport Research Laboratory. International Road Maintenance Handbook: Practical Guidelines for Rural Road Maintenance ; Maintenance of Roadside Areas and Drainage. Transport Research Laboratory, 1994.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.