APA (7th ed.) Citation

O'Mahony, D., Peirce, M., & Tewari, H. (1997). Electronic payment systems. Artech House.

Chicago Style (17th ed.) Citation

O'Mahony, Donal, Michael Peirce, and Hitesh Tewari. Electronic Payment Systems. Boston ; London: Artech House, 1997.

MLA (9th ed.) Citation

O'Mahony, Donal, et al. Electronic Payment Systems. Artech House, 1997.