Gaya APA
Wardhaugh, R.
(2010).
An Introduction to Sociolinguistics Sixth Edition
(
PERTAMA)
.
JAKARTA:
Wiley-Blackwell.
Gaya MLA
Wardhaugh, Ronald.
"An Introduction to Sociolinguistics Sixth Edition".
PERTAMA
JAKARTA:
Wiley-Blackwell,
2010.
Text.