Cita APA (7th ed.)

Blair, L. H., & Schwartz, A. I. (1972). How clean is our city?: A guide for measuring the effectiveness of solid waste collection activities. Urban Institute.

Cita Chicago (17th ed.)

Blair, Louis H., i Alfred I. Schwartz. How Clean Is Our City?: A Guide for Measuring the Effectiveness of Solid Waste Collection Activities. Washington: Urban Institute, 1972.

Cita MLA (8th ed.)

Blair, Louis H., i Alfred I. Schwartz. How Clean Is Our City?: A Guide for Measuring the Effectiveness of Solid Waste Collection Activities. Urban Institute, 1972.