Porter, D. R. (1988). Flexible zoning: How it works. Urban Land Institute.
Chicago Style (17th ed.) CitationPorter, Douglas R. Flexible Zoning: How It Works. Washington: Urban Land Institute, 1988.
MLA (9th ed.) CitationPorter, Douglas R. Flexible Zoning: How It Works. Urban Land Institute, 1988.
Warning: These citations may not always be 100% accurate.