National Productivity Corporation & Perbadanan Produktiviti Negara. (1997). Productivity primer. National Productivity Corporation.
芝加哥风格引文National Productivity Corporation 与 Perbadanan Produktiviti Negara. Productivity Primer. Petaling Jaya: National Productivity Corporation, 1997.
MLA引文National Productivity Corporation 与 Perbadanan Produktiviti Negara. Productivity Primer. National Productivity Corporation, 1997.
警告：这些引文格式不一定是100％准确.