Chaffey, D. (2013). Emarketing Excellence (4th.). Routledge.
Lua i Stíl Chicago (17ú heag.)Chaffey, Dave. Emarketing Excellence. 4th. New York: Routledge, 2013.
Lua MLA (9ú heag.)Chaffey, Dave. Emarketing Excellence. 4th. Routledge, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.