Buchari Alma
Alfabeta, 2007
Buku Teks
Lovelock, Christopher H.
Indeks, 2005
Buku Teks SO
Rambat Lupiyoadi
Salemba Empat, 2013
Buku Teks SO
Rambat Lupiyoadi
Salemba Empat, 2014
Multimedia
Trisakti International Center for Service studies FE-Usakti, 2006
Majalah, Jurnal, Buletin