Powell, G. R. (2008). Marketing calculator: Measuring and managing return on marketing investment. John Wiley & Sons (Asia).
Chicago-Zitierstil (17. Ausg.)Powell, Guy R. Marketing Calculator: Measuring and Managing Return on Marketing Investment. Singapore: John Wiley & Sons (Asia), 2008.
MLA-Zitierstil (9. Ausg.)Powell, Guy R. Marketing Calculator: Measuring and Managing Return on Marketing Investment. John Wiley & Sons (Asia), 2008.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.