Cita APA (7a ed.)

Peter Siemund. (2013). Varieties of English (1.). Cambridge University Press.

Cita Chicago Style (17a ed.)

Peter Siemund. Varieties of English. 1. Cambridge University Press, 2013.

Cita MLA (8a ed.)

Peter Siemund. Varieties of English. 1. Cambridge University Press, 2013.