Cita APA (7th ed.)

Norton, P. L., & Nelson, T. M. (1959). Urban problems and techniques. Chandler-Davis Pub. Co.

Cita Chicago (17th ed.)

Norton, Perry L., i T. Milton Nelson. Urban Problems and Techniques. [Lexington, Mass.]: Chandler-Davis Pub. Co, 1959.

Cita MLA (9th ed.)

Norton, Perry L., i T. Milton Nelson. Urban Problems and Techniques. Chandler-Davis Pub. Co, 1959.