Drucker, P. F. (1985). Innovation and entrepreneurship: Practice and principles. William Heinemann.
芝加哥风格引文Drucker, Peter F. Innovation and Entrepreneurship: Practice and Principles. London: William Heinemann, 1985.
MLA引文Drucker, Peter F. Innovation and Entrepreneurship: Practice and Principles. William Heinemann, 1985.
警告：这些引文格式不一定是100％准确.