Andrews, E. (1935). New numbers: How acceptance of a duodecimal base would simplify mathematics. Harcourt, Brace and Company.
Lua i Stíl Chicago (17ú heag.)Andrews, Emerson. New Numbers: How Acceptance of a Duodecimal Base Would Simplify Mathematics. New York,N.Y: Harcourt, Brace and Company, 1935.
Lua MLA (9ú heag.)Andrews, Emerson. New Numbers: How Acceptance of a Duodecimal Base Would Simplify Mathematics. Harcourt, Brace and Company, 1935.
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