Chaffey, D. &. S. P. (2013). E-marketing excellence. Routledge.
Chicago-čujuhus (17. p.)Chaffey, Dave & Smith PR. E-marketing Excellence. Landon: Routledge, 2013.
MLA-čujuhus (9. p.)Chaffey, Dave & Smith PR. E-marketing Excellence. Routledge, 2013.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.