Frans, K., Endar, S.(1997).Operasional kantor depan hotel : (hotel front office operationals) / Endar Sugiarto; editor, Frans Kowa (Cet.1).Jakarta:Gramedia Pustaka Utama.
Gaya MLA
Kowa, Frans., Sugiarto, Endar."Operasional kantor depan hotel : (hotel front office operationals) / Endar Sugiarto; editor, Frans Kowa".Cet.1Jakarta:Gramedia Pustaka Utama,1997.Textbook.