Gaya APA
Widjaya, M., Artyasa, U, S. (2005).
Housekeeping Operation : Tata Graha Perhotelan .
Hoboken, NJ:
Humaniora Utama Press.
Gaya MLA
Widjaya, Marra., Artyasa, Usin, S.
"Housekeeping Operation : Tata Graha Perhotelan".
Hoboken, NJ:
Humaniora Utama Press,
2005.
Text.