(1964). English 900: Prepared by english language services, INC. New York: The macmilian company.
Trích dẫn kiểu ChicagoEnglish 900: Prepared By English Language Services, INC. New York: The macmilian company, 1964.
MLA引文English 900: Prepared By English Language Services, INC. New York: The macmilian company, 1964.
警告:這些引文格式不一定是100%准確.