Gaya APA
Kotler, P. et al (1998).
Marketing for hospitality and tourism (2nd edition).
Upper Saddle River, NJ:
Prentice Hall.
Gaya MLA
Kotler, Philip. et al.
"Marketing for hospitality and tourism".
2nd edition
Upper Saddle River, NJ:
Prentice Hall,
1998.
BUKU.