Παραπομπή APA

Witheford, D. K., & Cunagin, W. D. (1992). Truck escape ramps. Washington, DC.: Transportation Research Board, National Research Council.

Παραπομπή Chicago Style

Witheford, David K., and Wiley D. Cunagin. Truck Escape Ramps. Washington, DC.: Transportation Research Board, National Research Council, 1992.

Παραπομπή MLA

Witheford, David K., and Wiley D. Cunagin. Truck Escape Ramps. Washington, DC.: Transportation Research Board, National Research Council, 1992.

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