APA (7th ed.) Citation

Telephony Publishing Corporation. Telephony's directory & buyers' guide for the telephone industry. Telephony Pub. Corp..

Chicago Style (17th ed.) Citation

Telephony Publishing Corporation. Telephony's Directory & Buyers' Guide for the Telephone Industry. Chicago: Telephony Pub. Corp..

MLA (9th ed.) Citation

Telephony Publishing Corporation. Telephony's Directory & Buyers' Guide for the Telephone Industry. Telephony Pub. Corp..

Warning: These citations may not always be 100% accurate.