Drucker, P. F. (1991). Innovation & entrepreneurship. Altrliated east- west.
Chicagoスタイル(17版)引用形式Drucker, Peter F. Innovation & Entrepreneurship. New delhi: Altrliated east- west, 1991.
MLA(9版)引用形式Drucker, Peter F. Innovation & Entrepreneurship. Altrliated east- west, 1991.
警告: この引用は必ずしも正確ではありません.