APA Style

Chaffey, D., Smith, P, R, (, R. (2017). Digital marketing excellence: planning, optimizing and integrating online marketing (5th.ed). London: Routledge, Taylor & Francis Group.

MLA Style

Chaffey, Dave,., Smith, P., R., (Paul, Russell),. "Digital marketing excellence: planning, optimizing and integrating online marketing". 5th.ed London: Routledge, Taylor & Francis Group, 2017. PDF.