APA (7th ed.) Citation

Gray, G. E., & Hoel, L. A. (1992). Public transportation. Prentice-Hall.

Chicago Style (17th ed.) Citation

Gray, George E., and Lester A. Hoel. Public Transportation. Englewood Cliffs, NJ: Prentice-Hall, 1992.

MLA (9th ed.) Citation

Gray, George E., and Lester A. Hoel. Public Transportation. Prentice-Hall, 1992.