Gaya APA

Wardhaugh, R., Fuller, J, M. (2015). An Introduction to Sociolinguistics (7th Edition). United Kingdom: John Wiley & Sons, Inc..

Gaya MLA

Wardhaugh, Ronald., Fuller, Janet, M.. "An Introduction to Sociolinguistics". 7th Edition United Kingdom: John Wiley & Sons, Inc., 2015. Text.