Zeithaml, Valarie A.
Services marketing
The McGraw-Hill , 1996
Buku Teks SO
Lovelock, Christopher H.
Services marketing
Pearson Prentice Hall, 2001
Buku Teks
Lovelock, Christopher H.
Services marketing
Prentice-Hall, 2000
Buku Teks
Marketing youth services
Artikel Jurnal
Trends in marketing services
Artikel Jurnal