MLA

Barrett, Daniel J, Robert G Byrnes, and Richard E Silverman. Linux Security Cookbook. Sebastopol: O'Reilly, 2003.

APA

Barrett, D. J, Byrnes, R. G, & Silverman, R. E. (2003). Linux security cookbook. Sebastopol: O'Reilly.

Chicago

Barrett, Daniel J., Robert G Byrnes, and Richard E Silverman. Linux Security Cookbook. Sebastopol: O'Reilly, 2003.