Gaya APA
Windasuri,Heria;Susanti,Hyacintha, .
(2017).
Excellent Service
.
Jakarta:
PT Gramedia Pustaka Utama.
Gaya MLA
Windasuri,Heria;Susanti,Hyacintha, .
"Excellent Service".
Jakarta:
PT Gramedia Pustaka Utama,
2017.
Text.