Farris, P. W., & Pfeifer, P. P. (2006). Marketing Metrics: 50+ Metrics Every Executive Should Master. Person Power.
Lua i Stíl Chicago (17ú heag.)Farris, Paul W., agus Phillip Pfeifer Pfeifer. Marketing Metrics: 50+ Metrics Every Executive Should Master. New Delhi: Person Power, 2006.
Lua MLA (9ú heag.)Farris, Paul W., agus Phillip Pfeifer Pfeifer. Marketing Metrics: 50+ Metrics Every Executive Should Master. Person Power, 2006.
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