APA (7th ed.) Citation

English Language Services, Inc. (Los Angeles, Calif.). (1979). New English course. English Language Services, Inc..

Chicago Style (17th ed.) Citation

English Language Services, Inc. (Los Angeles, Calif.). New English Course. Los Angeles: English Language Services, Inc., 1979.

MLA (9th ed.) Citation

English Language Services, Inc. (Los Angeles, Calif.). New English Course. English Language Services, Inc., 1979.

Warning: These citations may not always be 100% accurate.