APA (7th ed.) Citation

Wilson, W., & Barnard, R. (1998). Fifty-Fifty: A basic course in communicative English (2nd edition.). Prentice Hall ELT.

Chicago Style (17th ed.) Citation

Wilson, Warren, and Roger Barnard. Fifty-Fifty: A Basic Course in Communicative English. 2nd edition. Singapore: Prentice Hall ELT, 1998.

MLA (9th ed.) Citation

Wilson, Warren, and Roger Barnard. Fifty-Fifty: A Basic Course in Communicative English. 2nd edition. Prentice Hall ELT, 1998.