APA

Jolley (E H), . (1997). Introduction To Telephony And Telegraphy. : .

Chicago

Jolley (E H), . 1997. Introduction To Telephony And Telegraphy. : .

Harvard

Jolley (E H), . (1997). Introduction To Telephony And Telegraphy. : .

MLA

Jolley (E H), . Introduction To Telephony And Telegraphy. : . 1997.