National Productivity Corporation. (2001). A glossary of productivity and quality terminologies. National Productivity Corporation.
芝加哥风格引文National Productivity Corporation. A Glossary of Productivity and Quality Terminologies. Petaling Jaya: National Productivity Corporation, 2001.
MLA引文National Productivity Corporation. A Glossary of Productivity and Quality Terminologies. National Productivity Corporation, 2001.
警告：这些引文格式不一定是100％准确.