Gaya APA
Sociolinguistics. (1980).
Cambridge:
Cambridge university.
Gaya Chicago
Sociolinguistics.
1st ed..
Cambridge:
Cambridge university,
1980.
Buku.
Gaya MLA
Sociolinguistics.
1st ed..
Cambridge:
Cambridge university,
1980.
Buku.
Gaya Turabian
Sociolinguistics.
Cambridge:
Cambridge university,
1980.
Buku.