National Productivity Corporation & Perbadanan Produktiviti Negara. (1997). Productivity primer. National Productivity Corporation.
Chicago Style (17th ed.) CitationNational Productivity Corporation and Perbadanan Produktiviti Negara. Productivity Primer. Petaling Jaya: National Productivity Corporation, 1997.
MLA引文National Productivity Corporation and Perbadanan Produktiviti Negara. Productivity Primer. National Productivity Corporation, 1997.
警告:這些引文格式不一定是100%准確.