Cita APA (7a ed.)
English Languaje Services, Inc. (1973). English this way. The Macmillan Company.
Cita Chicago Style (17a ed.)
English Languaje Services, Inc. English This Way. New York: The Macmillan Company, 1973.
Cita MLA (9a ed.)
English Languaje Services, Inc. English This Way. The Macmillan Company, 1973.
Precaución: Estas citas no son 100% exactas.