Gaya APA

Held, G. (1999). (FIK - SISTEM INFORMASI - TEKNIK INFORMATIKA) Cisco Security Architectures (1). USA: McGraw-Hill Book Company.

Gaya MLA

Held, Gil. "(FIK - SISTEM INFORMASI - TEKNIK INFORMATIKA) Cisco Security Architectures". 1 USA: McGraw-Hill Book Company, 1999. TEXT.