Cita APA (7th ed.)

Zerbe, R. O., & Croke, K. (1975). Urban transportation for the environment. Ballinger Publishing Company.

Cita Chicago (17th ed.)

Zerbe, Richard O., i Kevin Croke. Urban Transportation for the Environment. Cambridge, Mass: Ballinger Publishing Company, 1975.

Cita MLA (9th ed.)

Zerbe, Richard O., i Kevin Croke. Urban Transportation for the Environment. Ballinger Publishing Company, 1975.