APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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