Gaya APA
haw to prepore toefl and twe. (2007).
Yogyakarta:
Andi.
Gaya Chicago
haw to prepore toefl and twe.
.
Yogyakarta:
Andi,
2007.
Buku.
Gaya MLA
haw to prepore toefl and twe.
.
Yogyakarta:
Andi,
2007.
Buku.
Gaya Turabian
haw to prepore toefl and twe.
Yogyakarta:
Andi,
2007.
Buku.