APA (7th ed.) Citation

O'Connor. (1990). Express yourself in written English. National Textbook.

Chicago Style (17th ed.) Citation

O'Connor. Express Yourself in Written English. Lincolnwood, New York: National Textbook, 1990.

MLA (9th ed.) Citation

O'Connor. Express Yourself in Written English. National Textbook, 1990.

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