APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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