Gaya APA

Freeborn, D. et al (2008). Varieties of English : An Introduction to the Study of Language (2). New York: Palgrave Macmillan.

Gaya MLA

Freeborn, Dennis. et al. "Varieties of English : An Introduction to the Study of Language". 2 New York: Palgrave Macmillan, 2008. Text.