Gaya APA
Let's Speak Advanced Level. (2016).
Yogyakarta:
Deepublish.
Gaya Chicago
Let's Speak Advanced Level.
.
Yogyakarta:
Deepublish,
2016.
Buku.
Gaya MLA
Let's Speak Advanced Level.
.
Yogyakarta:
Deepublish,
2016.
Buku.
Gaya Turabian
Let's Speak Advanced Level.
Yogyakarta:
Deepublish,
2016.
Buku.