APA Citation

Knapp, E. H. (1977). Open space standards and criteria for the Delaware Valley. Philadelphia, Pa.: Delaware Valley Regional Planning Commission.

Chicago Style Citation

Knapp, Edwin H. Open Space Standards and Criteria for the Delaware Valley. Philadelphia, Pa.: Delaware Valley Regional Planning Commission, 1977.

MLA Citation

Knapp, Edwin H. Open Space Standards and Criteria for the Delaware Valley. Philadelphia, Pa.: Delaware Valley Regional Planning Commission, 1977.

Warning: These citations may not always be 100% accurate.