Gaya APA

PURBO, O, W., WIHARJITO, T. (2000). Keamanan Jaringan Internet (1). : Longman Group limited.

Gaya MLA

PURBO, Onno, W.., WIHARJITO, Tony. "Keamanan Jaringan Internet". 1 : Longman Group limited, 2000. Buku.