Gaya APA
Speaking English Correctly. (2005).
Yogyakarta:
.
Gaya Chicago
Speaking English Correctly.
.
Yogyakarta:
,
2005.
Buku.
Gaya MLA
Speaking English Correctly.
.
Yogyakarta:
,
2005.
Buku.
Gaya Turabian
Speaking English Correctly.
Yogyakarta:
,
2005.
Buku.