Gaya APA
Widjaya, M., Artyasa, U, S. (2005).
Housekeeping Operation: Tata Graha Perhotelan (Cetakan I).
Bandung:
Humaniora.
Gaya MLA
Widjaya, Marra., Artyasa, Usin, S..
"Housekeeping Operation: Tata Graha Perhotelan".
Cetakan I
Bandung:
Humaniora,
2005.
.