APA aipamena

Bigham, T. C., & Roberts, M. J. (1952). Transportation: Principles and problems (2nd ed.). McGraw-Hill.

Chicago Style aipamena

Bigham, Truman C., and Merrill J. Roberts. Transportation: Principles and Problems. 2nd ed. New York: McGraw-Hill, 1952.

MLA aipamena

Bigham, Truman C., and Merrill J. Roberts. Transportation: Principles and Problems. 2nd ed. McGraw-Hill, 1952.