APA (7th ed.) Citation

O'Reilly, W., & Steven-Johan, Z. (1992). The enemy within. Times Books International.

Chicago Style (17th ed.) Citation

O'Reilly, William, and Zarin Steven-Johan. The Enemy Within. Singapore Kuala Lumpur: Times Books International, 1992.

MLA (9th ed.) Citation

O'Reilly, William, and Zarin Steven-Johan. The Enemy Within. Times Books International, 1992.