Cita APA (7th ed.)

Gay, R. (2007). Online Marketing (1st.). HarperCollins Publishers.

Cita Chicago (17th ed.)

Gay, Richard. Online Marketing. 1st. New York: HarperCollins Publishers, 2007.

Cita MLA (9th ed.)

Gay, Richard. Online Marketing. 1st. HarperCollins Publishers, 2007.