Gaya APA
Orbani, L. (2017).
Housekeeping passport – manajemen operasional housekeeping (Ed. 1).
Yogyakarta:
CV Andi Offset.
Gaya MLA
Orbani, Ludfi.
"Housekeeping passport – manajemen operasional housekeeping".
Ed. 1
Yogyakarta:
CV Andi Offset,
2017.
Umum.