Koch Richard. (1998). The 80/20 principle: The secret of achieving more with less. Currency/Doubleday.
Chicago Style (17th ed.) CitationKoch Richard. The 80/20 Principle: The Secret of Achieving More with Less. Currency/Doubleday, 1998.
MLA (8th ed.) CitationKoch Richard. The 80/20 Principle: The Secret of Achieving More with Less. Currency/Doubleday, 1998.
Warning: These citations may not always be 100% accurate.