Czinkota, Michael R., author
South Western Cengage Learning, 2013
Buku Teks
Lovelock, Christopher H., author
Prentice-Hall, 1960
Buku Teks
Kotler, Philip, author
Prentice-Hall, 2000
Buku Teks
Kotler, Philip, author
Prentice-Hall, 2003
Buku Teks
Kotler, Philip, author
Prentice-Hall, 1989
Buku Teks