Gaya APA
Headway Intermediate Pronunciation. (1998).
Oxford:
Oxford University Press.
Gaya Chicago
Headway Intermediate Pronunciation.
.
Oxford:
Oxford University Press,
1998.
Buku.
Gaya MLA
Headway Intermediate Pronunciation.
.
Oxford:
Oxford University Press,
1998.
Buku.
Gaya Turabian
Headway Intermediate Pronunciation.
Oxford:
Oxford University Press,
1998.
Buku.