Cita APA (7a ed.)
Witherspoon, A. (1973). Common errors in english and how to avoid them. Littlefield.
Cita Chicago Style (17a ed.)
Witherspoon, Alexander. Common Errors in English and How to Avoid Them. New Jersey: Littlefield, 1973.
Cita MLA (9a ed.)
Witherspoon, Alexander. Common Errors in English and How to Avoid Them. Littlefield, 1973.
Precaución: Estas citas no son 100% exactas.