Cita APA (7a ed.)

Marckwardt, A. H. (1958). American English. Oxford University Press.

Cita Chicago Style (17a ed.)

Marckwardt, Albert Henry. American English. New York: Oxford University Press, 1958.

Cita MLA (9a ed.)

Marckwardt, Albert Henry. American English. Oxford University Press, 1958.