Peter Siemund. (2013). Varieties of English (1.). Cambridge University Press.
Chicago Style (17th ed.) CitationPeter Siemund. Varieties of English. 1. Cambridge University Press, 2013.
MLA引文Peter Siemund. Varieties of English. 1. Cambridge University Press, 2013.
警告：這些引文格式不一定是100％准確.