Παραπομπή APA

Eckert, R. D. (1972). Airports and congestion: A problem of misplaced subsidies. Washington: American Enterprise Institute for public policy research.

Παραπομπή Chicago Style

Eckert, Ross D. Airports and Congestion: A Problem of Misplaced Subsidies. Washington: American Enterprise Institute for public policy research, 1972.

Παραπομπή MLA

Eckert, Ross D. Airports and Congestion: A Problem of Misplaced Subsidies. Washington: American Enterprise Institute for public policy research, 1972.

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