Pennsylvania State University. Cooperative Extension Service. Extension circular. Cooperative Extension Service, College of Agriculture, Pennsylvania State University.
Chicago Style (17th ed.) CitationPennsylvania State University. Cooperative Extension Service. Extension Circular. University Park, Pa.: Cooperative Extension Service, College of Agriculture, Pennsylvania State University.
MLA (9th ed.) CitationPennsylvania State University. Cooperative Extension Service. Extension Circular. Cooperative Extension Service, College of Agriculture, Pennsylvania State University.
Warning: These citations may not always be 100% accurate.