Gaya APA

Wardhaugh, R., M., F, ,, J. (2015). An Introduction to Sociolinguistics (Edisi ke-7). John Wiley: Wiley-Blackwell.

Gaya MLA

Wardhaugh, Ronald., M., Fuller, ,, Janet. "An Introduction to Sociolinguistics". Edisi ke-7 John Wiley: Wiley-Blackwell, 2015. Text.