Gaya APA
Angelo, R, M. (2017).
Hospitality Today An Introduction (Eighth Edition).
Amerika:
AHLEI (American Hotel & Loging Educational Institue.
Gaya MLA
Angelo, Rocca, M.
"Hospitality Today An Introduction".
Eighth Edition
Amerika:
AHLEI (American Hotel & Loging Educational Institue,
2017.
BUKU.