Towers, W. K. (2004). Masters of Space Morse and the Telegraph; Thompson and the Cable; Bell and the Telephone; Marconi and the Wireless Telegraph; Carty and the Wireless Telephone. Project Gutenberg.
Chicago Style (17th ed.) CitationTowers, Walter Kellogg. Masters of Space Morse and the Telegraph; Thompson and the Cable; Bell and the Telephone; Marconi and the Wireless Telegraph; Carty and the Wireless Telephone. Project Gutenberg, 2004.
MLA (9th ed.) CitationTowers, Walter Kellogg. Masters of Space Morse and the Telegraph; Thompson and the Cable; Bell and the Telephone; Marconi and the Wireless Telegraph; Carty and the Wireless Telephone. Project Gutenberg, 2004.
Warning: These citations may not always be 100% accurate.