Παραπομπή APA

(2002). Research results digest. Washington, D.C.: Transportation Research Board, National Research Council.

Παραπομπή Chicago Style

Research Results Digest. Washington, D.C.: Transportation Research Board, National Research Council, 2002.

Παραπομπή MLA

Research Results Digest. Washington, D.C.: Transportation Research Board, National Research Council, 2002.

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