APA aipamena

Ryan, D. (2012). Understanding Digital Marketing (2nd.). Kogan Page.

Chicago Style aipamena

Ryan, Damian. Understanding Digital Marketing. 2nd. Kogan Page, 2012.

MLA aipamena

Ryan, Damian. Understanding Digital Marketing. 2nd. Kogan Page, 2012.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.