Andrews, E. (1935). New numbers: How acceptance of a duodecimal base would simplify mathematics. Harcourt, Brace and Company.
Citazione stile Chigago Style (17a edizione)Andrews, Emerson. New Numbers: How Acceptance of a Duodecimal Base Would Simplify Mathematics. New York,N.Y: Harcourt, Brace and Company, 1935.
Citatione MLA (9a ed.)Andrews, Emerson. New Numbers: How Acceptance of a Duodecimal Base Would Simplify Mathematics. Harcourt, Brace and Company, 1935.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.