DRUCKER PETER F. (1999). MANAGEMENT CHALLENGES FOR THE 21ST CENTURY. BUTTERWORTH-HEINEMANN.
芝加哥风格引文DRUCKER PETER F. MANAGEMENT CHALLENGES FOR THE 21ST CENTURY. OXFORD: BUTTERWORTH-HEINEMANN, 1999.
MLA引文DRUCKER PETER F. MANAGEMENT CHALLENGES FOR THE 21ST CENTURY. BUTTERWORTH-HEINEMANN, 1999.
警告：这些引文格式不一定是100％准确.