APA (7e ed.) Bronvermelding

Bish, R. L., & Kirk, R. J. (1974). Economic principles and urban problems. Prentice - hall.

Chicago (17e ed.) Bronvermelding

Bish, Robert L., en Robert J. Kirk. Economic Principles and Urban Problems. New Jersey: Prentice - hall, 1974.

MLA (9e ed.) Bronvermelding

Bish, Robert L., en Robert J. Kirk. Economic Principles and Urban Problems. Prentice - hall, 1974.