Gaya APA
Let's speak english. (2008).
Yogyakarta:
Pustaka Pelajar.
Gaya Chicago
Let's speak english.
.
Yogyakarta:
Pustaka Pelajar,
2008.
Text.
Gaya MLA
Let's speak english.
.
Yogyakarta:
Pustaka Pelajar,
2008.
Text.
Gaya Turabian
Let's speak english.
Yogyakarta:
Pustaka Pelajar,
2008.
Print.