Hoffman, K. Douglas
Essentials of services marketing
Harcourt College Publishers, 2002
 Buku Teks
Still, Richard R.
Sales management decisions, strategies and cases
Prentice-Hall, 1988
 Buku Teks
Hoffman, K. Douglas
Services marketing: concepts, strategies, and​ cases
Cengage Learning, 2017
 Buku Teks
Still, Richard R.
Essentials of marketing
Prentice-Hall, 1966
 Buku Teks
McDaniel, Carl
Marketing essentials
South Western Cengage Learning, 2012
 Buku Teks