Gorle Peter & James Long. (1973). Essentials of product planning. McGraw hill.
シカゴスタイル引用形Gorle Peter , James Long. Essentials of Product Planning. London: McGraw hill, 1973.
MLA引用形式Gorle Peter , James Long. Essentials of Product Planning. McGraw hill, 1973.
警告: この引用は必ずしも正確ではありません.