Citação norma APA

MarketingSherpa, Inc, & ebrary, Inc. (2003). Proven online ad sales tactics: Practical know-how from profitable web and newsletter publishers. MarketingSherpa, Inc..

Citação norma Chicago

MarketingSherpa, Inc, and Inc ebrary. Proven Online Ad Sales Tactics: Practical Know-how from Profitable Web and Newsletter Publishers. Portsmouth, R.I.: MarketingSherpa, Inc., 2003.

Citação norma MLA

MarketingSherpa, Inc, and Inc ebrary. Proven Online Ad Sales Tactics: Practical Know-how from Profitable Web and Newsletter Publishers. MarketingSherpa, Inc., 2003.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.