Intercity passenger demand models : state-of-the-art
MLA
Hartgen, David T. Intercity Passenger Demand Models: State-of-the-art. Washington, D.C.: U.S. Dept. of Transportation, Research & Special Programs Directorate, Office of University Research, 1977-
APA, 7th edition
Hartgen, D. T. (1977-). Intercity passenger demand models: state-of-the-art. Washington, D.C.: U.S. Dept. of Transportation, Research & Special Programs Directorate, Office of University Research
Chicago, 17th edition
Hartgen, David T. Intercity passenger demand models: state-of-the-art. Washington, D.C.: U.S. Dept. of Transportation, Research & Special Programs Directorate, Office of University Research, 1977-