APA

Shieh S. P., Lee D. T. & Tygar J. D. (2005). Computer Security in the 21st Century. New York: Springer.

Chicago

Shieh S P, Lee D T and Tygar J D. 2005. Computer Security in the 21st Century. New York: Springer.

Harvard

Shieh S. P., Lee D. T. and Tygar J. D. (2005). Computer Security in the 21st Century. New York: Springer.

MLA

Shieh S P, Lee D T and Tygar J D. Computer Security in the 21st Century. New York: Springer. 2005.