Drucker, P. F., & Peter F. Drucker. Managing oneself. Boston, Mass: Harvard Business Press.
シカゴスタイル引用形Drucker, Peter F., , Peter F. Drucker. Managing Oneself. Boston, Mass: Harvard Business Press.
MLA引用形式Drucker, Peter F., , Peter F. Drucker. Managing Oneself. Boston, Mass: Harvard Business Press.
警告: この引用は必ずしも正確ではありません.