Gaya APA
Petrus, I. et al
(2017).
Basic Pronounciation
(
Cet. 1)
.
:
NoerFikri Offset.
Gaya MLA
Petrus, Ismail. et al.
"Basic Pronounciation".
Cet. 1
:
NoerFikri Offset,
2017.
Buku.