Popenker & Williams. (2008). Machine gun: The development of the machine gun from the nineteenth century to the present day. Crowood.
Chicago Style (17th ed.) CitationPopenker and Williams. Machine Gun: The Development of the Machine Gun from the Nineteenth Century to the Present Day. Ramsbury: Crowood, 2008.
MLA (8th ed.) CitationPopenker and Williams. Machine Gun: The Development of the Machine Gun from the Nineteenth Century to the Present Day. Crowood, 2008.
Warning: These citations may not always be 100% accurate.