Gaya APA
Holmes, J., Wilson, N. (2017).
An Introduction to sociolinguistics (edisi 5).
New York:
Distributor/Routledge..
Gaya MLA
Holmes, Janet., Wilson, Nick.
"An Introduction to sociolinguistics".
edisi 5
New York:
Distributor/Routledge.,
2017.
Prodi TBI.