Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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