Bigham, T. C. (1946). Transportation: Principles and problems. New York [etc.]: McGraw-Hill Book Company.
Παραπομπή Chicago StyleBigham, Truman C. Transportation: Principles and Problems. New York [etc.]: McGraw-Hill Book Company, 1946.
Παραπομπή MLABigham, Truman C. Transportation: Principles and Problems. New York [etc.]: McGraw-Hill Book Company, 1946.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.