Gaya APA
Wardhaugh, R., Fuller, J, M. (2021).
An Introduction to Sociolinguistics (8th edition).
United States of America:
Wiley-Blackwell.
Gaya MLA
Wardhaugh, Ronald., Fuller, Janet, M..
"An Introduction to Sociolinguistics".
8th edition
United States of America:
Wiley-Blackwell,
2021.
Book.