Gaya APA
Leo, S.
(2003).
English for Professional Accomodation Services
(
Cetakan II)
.
Jakarta:
Gramedia Pustaka Utama.
Gaya MLA
Leo, Sutanto.
"English for Professional Accomodation Services".
Cetakan II
Jakarta:
Gramedia Pustaka Utama,
2003.
.