Gaya APA
SUGIARTO, E. (2004).
Operasional kantor depan hotel (hotel front office operationals) .
Jakarta:
Gramedia Pustaka Utama.
Gaya MLA
SUGIARTO, Endar.
"Operasional kantor depan hotel (hotel front office operationals)".
Jakarta:
Gramedia Pustaka Utama,
2004.
Buku.