Cita APA (7a ed.)

Marckwardt, A. H. (1951). Introduction to the english language. Oxford.

Cita Chicago Style (17a ed.)

Marckwardt, Albert H. Introduction to the English Language. New York, Estados Unidos: Oxford, 1951.

Cita MLA (9a ed.)

Marckwardt, Albert H. Introduction to the English Language. Oxford, 1951.