Gaya APA
Sujatno, A, B.
(2008).
HOTEL COURTESY : The Secret of 5 Star Hotel Courtesy
.
yogyakarta:
Andi.
Gaya MLA
Sujatno, A., Bambang.
"HOTEL COURTESY : The Secret of 5 Star Hotel Courtesy".
yogyakarta:
Andi,
2008.
Text.