(2004). Scientific American Supplement, No. 787, January 31, 1891. Project Gutenberg.
Chicago Style (17th ed.) CitationScientific American Supplement, No. 787, January 31, 1891. Project Gutenberg, 2004.
MLA (9th ed.) CitationScientific American Supplement, No. 787, January 31, 1891. Project Gutenberg, 2004.
Warning: These citations may not always be 100% accurate.