Garfinkel, S., & Spafford, G. (1996). Practical UNIX and Internet Security (2nd ed.). O'Reilly & Associates.
Cita Chicago (17th ed.)Garfinkel, Simson, i Gene Spafford. Practical UNIX and Internet Security. 2nd ed. United States of America: O'Reilly & Associates, 1996.
Cita MLA (9th ed.)Garfinkel, Simson, i Gene Spafford. Practical UNIX and Internet Security. 2nd ed. O'Reilly & Associates, 1996.