Walker, T. A. (1890). The Severn tunnel: Its construction and difficulties, 1872-1887 (2nd ed.). R. Bentley and Son.
Chicago Style (17th ed.) CitationWalker, Thomas Andrew. The Severn Tunnel: Its Construction and Difficulties, 1872-1887. 2nd ed. London: R. Bentley and Son, 1890.
MLA (9th ed.) CitationWalker, Thomas Andrew. The Severn Tunnel: Its Construction and Difficulties, 1872-1887. 2nd ed. R. Bentley and Son, 1890.
Warning: These citations may not always be 100% accurate.