Drucker, P. F. (2011). Innovation & entrepreneurship. Butterworth.
芝加哥风格引文Drucker, Peter F. Innovation & Entrepreneurship. Oxford: Butterworth, 2011.
MLA引文Drucker, Peter F. Innovation & Entrepreneurship. Butterworth, 2011.
警告：这些引文格式不一定是100％准确.
APA引文