APA Style

Chaffey, D., Smith, P, R. (2017). Digital marketing excellence : planning, optimizing and integrating online marketing (1st ed). London: Routledge, Taylor & Francis Group.

MLA Style

Chaffey, Dave., Smith, P., R.. "Digital marketing excellence : planning, optimizing and integrating online marketing". 1st ed London: Routledge, Taylor & Francis Group, 2017. e-Book.