APA (7th ed.) Citation

Wilson, W., & Barnard, R.. (1992). Fifty-fifty: A basic course in communicative English. Regents/Prentice Hall.

Chicago Style (17th ed.) Citation

Wilson, Warren, and Roger Barnard. Fifty-fifty: A Basic Course in Communicative English. Englewood Cliffs, NJ: Regents/Prentice Hall, 1992.

MLA (9th ed.) Citation

Wilson, Warren, and Roger Barnard. Fifty-fifty: A Basic Course in Communicative English. Regents/Prentice Hall, 1992.