Ritchie, W. (1940). John Gutenberg, 1440-1940: A fanciful story of the 15th Century. Ward Ritchie.
Chicago Style (17th ed.) CitationRitchie, Ward. John Gutenberg, 1440-1940: A Fanciful Story of the 15th Century. Los Angeles: Ward Ritchie, 1940.
MLA (9th ed.) CitationRitchie, Ward. John Gutenberg, 1440-1940: A Fanciful Story of the 15th Century. Ward Ritchie, 1940.
Warning: These citations may not always be 100% accurate.