American School of Correspondence. Cyclopedia of Telephony and Telegraphy, Vol. 2 A General Reference Work on Telephony, etc. etc.
Chicago Style (17th ed.) CitationAmerican School of Correspondence. Cyclopedia of Telephony and Telegraphy, Vol. 2 A General Reference Work on Telephony, Etc. Etc.
MLA (9th ed.) CitationAmerican School of Correspondence. Cyclopedia of Telephony and Telegraphy, Vol. 2 A General Reference Work on Telephony, Etc. Etc.
Warning: These citations may not always be 100% accurate.