Gaya APA
CHA, J, J, V, P. et al (1987).
The Art and Science of Hospitaluty Management .
USA:
Educational Institusi.
Gaya MLA
CHA, Jerome, J., Vallen,, Ph.D.,. et al.
"The Art and Science of Hospitaluty Management".
USA:
Educational Institusi,
1987.
Text.