APA (7e ed.) Bronvermelding

Andrews, E. (1935). New numbers: How acceptance of a duodecimal base would simplify mathematics. Harcourt, Brace and Company.

Chicago (17e ed.) Bronvermelding

Andrews, Emerson. New Numbers: How Acceptance of a Duodecimal Base Would Simplify Mathematics. New York,N.Y: Harcourt, Brace and Company, 1935.

MLA (9e ed.) Bronvermelding

Andrews, Emerson. New Numbers: How Acceptance of a Duodecimal Base Would Simplify Mathematics. Harcourt, Brace and Company, 1935.