APA

Wilson K., . (1993). The Columbia Guide to standard American English. New York: Columbia University Press.

Chicago

Wilson K.G, . 1993. The Columbia Guide to standard American English. New York: Columbia University Press.

Harvard

Wilson K., . (1993). The Columbia Guide to standard American English. New York: Columbia University Press.

MLA

Wilson K.G, . The Columbia Guide to standard American English. New York: Columbia University Press. 1993.