Gaya APA
Orbani, L. (2017).
Housekeeping Passport - Manajemen Operasional Housekeeping Lanjut .
Yogyakarta:
CV Andi Offset.
Gaya MLA
Orbani, Ludfi.
"Housekeeping Passport - Manajemen Operasional Housekeeping Lanjut".
Yogyakarta:
CV Andi Offset,
2017.
Textbook.