Lovelock, Christopher H.
Services marketing
Prentice-Hall, 1960
 Buku Teks
Kotler, Philip
Marketing management
Prentice-Hall, 2000
 Buku Teks
Kotler, Philip
Marketing management
Prentice-Hall, 2003
 Buku Teks
Kotler, Philip
Marketing management
Prentice-Hall, 1989
 Buku Teks
Kotler, Philip
Marketing management
[publisher not identified], [date of publication not identified]
 Buku Teks