Cita APA (7a ed.)

Gray, G. E., & Hoel, L. A. (1979). Public transportation: Planning, operations and management (1a ed.). Prentice-Hall International.

Cita Chicago Style (17a ed.)

Gray, George E., y Lester A. Hoel. Public Transportation: Planning, Operations and Management. 1a ed. New Jersey: Prentice-Hall International, 1979.

Cita MLA (9a ed.)

Gray, George E., y Lester A. Hoel. Public Transportation: Planning, Operations and Management. 1a ed. Prentice-Hall International, 1979.