Cita APA (7a ed.)

Vacca, J. R. (1996). Internet security secrets. [S.n.].

Cita Chicago Style (17a ed.)

Vacca, John R. Internet Security Secrets. Foster City: [S.n.], 1996.

Cita MLA (9a ed.)

Vacca, John R. Internet Security Secrets. [S.n.], 1996.