Cita APA (7th ed.)
ebrary, Inc. (2003). Proven tactics in viral marketing: Online games, quizzes, eCards, contests & "buzz" building. MarketingSherpa, Inc..
Cita Chicago (17th ed.)
ebrary, Inc. Proven Tactics in Viral Marketing: Online Games, Quizzes, ECards, Contests & "Buzz" Building. Portsmouth, R.I.: MarketingSherpa, Inc., 2003.
Cita MLA (9th ed.)
ebrary, Inc. Proven Tactics in Viral Marketing: Online Games, Quizzes, ECards, Contests & "Buzz" Building. MarketingSherpa, Inc., 2003.
Atenció: Aquestes cites poden no estar 100% correctes.