Douglas, J. C. (1875). A manual of telegraph construction : the mechanical elements of electric telegraph engineering / by John Christie Douglas: The mechanical elements of electric telegraph engineering. Griffin.
Chicago Style (17th ed.) CitationDouglas, John Christie. A Manual of Telegraph Construction : The Mechanical Elements of Electric Telegraph Engineering / by John Christie Douglas: The Mechanical Elements of Electric Telegraph Engineering. London: Griffin, 1875.
MLA (9th ed.) CitationDouglas, John Christie. A Manual of Telegraph Construction : The Mechanical Elements of Electric Telegraph Engineering / by John Christie Douglas: The Mechanical Elements of Electric Telegraph Engineering. Griffin, 1875.
Warning: These citations may not always be 100% accurate.