Drucker, P. F. (1991). Innovation & entrepreneurship. Altrliated east- west.
芝加哥风格引文Drucker, Peter F. Innovation & Entrepreneurship. New delhi: Altrliated east- west, 1991.
MLA引文Drucker, Peter F. Innovation & Entrepreneurship. Altrliated east- west, 1991.
警告：这些引文格式不一定是100％准确.