Cita APA (7a ed.)

Marckwardt, A., & Walcott, F. G. (1938). Facts about current english usage. Appleton-Century-Croffts.

Cita Chicago Style (17a ed.)

Marckwardt, Albert, y Fred G. Walcott. Facts About Current English Usage. New York: Appleton-Century-Croffts, 1938.

Cita MLA (8a ed.)

Marckwardt, Albert, y Fred G. Walcott. Facts About Current English Usage. Appleton-Century-Croffts, 1938.