APA

Garfinkel (Simson) ;Spafford (Gene), . (1999). Practical Unix And Internet Security. : .

Chicago

Garfinkel (Simson) ;Spafford (Gene), . 1999. Practical Unix And Internet Security. : .

Harvard

Garfinkel (Simson) ;Spafford (Gene), . (1999). Practical Unix And Internet Security. : .

MLA

Garfinkel (Simson) ;Spafford (Gene), . Practical Unix And Internet Security. : . 1999.