Services, E. L. (1964). English 900 / English Langage Services. Macmillan.
Chicago Style (17th ed.) CitationServices, English Language. English 900 / English Langage Services. Macmillan, 1964.
MLA (8th ed.) CitationServices, English Language. English 900 / English Langage Services. Macmillan, 1964.
Warning: These citations may not always be 100% accurate.