Drucker, P. F. (1985). Innovation and entrepreneurship: Practice and principles. Harper & Row.
Chicagoスタイル(17版)引用形式Drucker, Peter Ferdinand. Innovation and Entrepreneurship: Practice and Principles. New York: Harper & Row, 1985.
MLA(9版)引用形式Drucker, Peter Ferdinand. Innovation and Entrepreneurship: Practice and Principles. Harper & Row, 1985.
警告: この引用は必ずしも正確ではありません.