APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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