APA (7th ed.) Citation

Gray, G. E., & Hoel, L. A. (1992). Public transportation (2nd ed.). Prentice Hall.

Chicago Style (17th ed.) Citation

Gray, George E., and Lester A. Hoel. Public Transportation. 2nd ed. Englewood Cliffs, N.J: Prentice Hall, 1992.

MLA (9th ed.) Citation

Gray, George E., and Lester A. Hoel. Public Transportation. 2nd ed. Prentice Hall, 1992.