APA (7th ed.) Citation

Sulkin, A. (2002). PBX systems for IP telephony. McGraw-Hill.

Chicago Style (17th ed.) Citation

Sulkin, Allan. PBX Systems for IP Telephony. New York: McGraw-Hill, 2002.

MLA (8th ed.) Citation

Sulkin, Allan. PBX Systems for IP Telephony. McGraw-Hill, 2002.