Gaya APA
windasuri, H., susanti, H.
(2017).
Excellent service
(
Cet. 1)
.
Jakarta:
Gramedia Pustaka Utama.
Gaya MLA
windasuri, Heria., susanti, Hycintha.
"Excellent service".
Cet. 1
Jakarta:
Gramedia Pustaka Utama,
2017.
Text.