Παραπομπή APA

Stanford University. Graduate School of Business., Ruppenthal, K. M., & National Defense Transportation Association. (1961). Challenge to transportation. Stanford: Graduate School of Business.

Παραπομπή Chicago Style

Stanford University. Graduate School of Business., Karl M. Ruppenthal, and National Defense Transportation Association. Challenge to Transportation. Stanford: Graduate School of Business, 1961.

Παραπομπή MLA

Stanford University. Graduate School of Business., Karl M. Ruppenthal, and National Defense Transportation Association. Challenge to Transportation. Stanford: Graduate School of Business, 1961.

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