Παραπομπή APA

E D Tittel Steve James. (1995). ISDN networking essentials. AP proffessional.

Παραπομπή Chicago Style

E D Tittel Steve James. ISDN Networking Essentials. MA: AP proffessional, 1995.

Παραπομπή MLA

E D Tittel Steve James. ISDN Networking Essentials. AP proffessional, 1995.