Andrews, E. (1935). New numbers: How acceptance of a duodecimal base would simplify mathematics. Harcourt, Brace and Company.
Chicago-referens (17:e uppl.)Andrews, Emerson. New Numbers: How Acceptance of a Duodecimal Base Would Simplify Mathematics. New York,N.Y: Harcourt, Brace and Company, 1935.
MLA-referens (9:e uppl.)Andrews, Emerson. New Numbers: How Acceptance of a Duodecimal Base Would Simplify Mathematics. Harcourt, Brace and Company, 1935.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.