Παραπομπή APA

(1990). Transportation Research Circular. Washington: National Research Council, Transportation Research Board.

Παραπομπή Chicago Style

Transportation Research Circular. Washington: National Research Council, Transportation Research Board, 1990.

Παραπομπή MLA

Transportation Research Circular. Washington: National Research Council, Transportation Research Board, 1990.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.