Gaya APA
Orbani, L. (2017).
Houskeeping Passport: Manajemen Operasional Housekeeping Dasar .
Yogyakarta:
Andi Offset.
Gaya MLA
Orbani, Ludfi.
"Houskeeping Passport: Manajemen Operasional Housekeeping Dasar".
Yogyakarta:
Andi Offset,
2017.
Buku Tercetak.