DRUCKER , P. (1989). MANAGEMENT TASKS RESPONSIBILITIES PRACTICES. ALLIED PUB.
芝加哥风格引文DRUCKER , P.F. MANAGEMENT TASKS RESPONSIBILITIES PRACTICES. AHMEDABAD: ALLIED PUB, 1989.
MLA引文DRUCKER , P.F. MANAGEMENT TASKS RESPONSIBILITIES PRACTICES. ALLIED PUB, 1989.
警告：这些引文格式不一定是100％准确.