Cita APA (7th ed.)

Chaffey, D. &. S. P. (2013). E-marketing excellence. Routledge.

Cita Chicago (17th ed.)

Chaffey, Dave & Smith PR. E-marketing Excellence. Landon: Routledge, 2013.

Cita MLA (9th ed.)

Chaffey, Dave & Smith PR. E-marketing Excellence. Routledge, 2013.