APA (7th ed.) Citation

Jolley, E. (1992). Introduction to telephony and telegraphy. Y.P Chopra.

Chicago Style (17th ed.) Citation

Jolley, E.H. Introduction to Telephony and Telegraphy. Allahabad: Y.P Chopra, 1992.

MLA (9th ed.) Citation

Jolley, E.H. Introduction to Telephony and Telegraphy. Y.P Chopra, 1992.