Gorle, P., & Long, J. (1973). Essentials of product planning. McGraw Hill.
Chicago Edition CitationGorle, Peter, and James Long. Essentials of Product Planning. New York: McGraw Hill, 1973.
MLA Edition CitationGorle, Peter, and James Long. Essentials of Product Planning. McGraw Hill, 1973.
Warning: These citations may not always be 100% accurate.