Cita APA

Smith, D. E. 1., & Ginsburg, J. (1961). Numbers and numerals: A story book for young and old. Washington: National Council of Teachers of Mathematics.

Citación estilo Chicago

Smith, David Eugene 1860-1944, y Jekuthiel Ginsburg. Numbers and Numerals: A Story Book for Young and Old. Washington: National Council of Teachers of Mathematics, 1961.

Cita MLA

Smith, David Eugene 1860-1944, y Jekuthiel Ginsburg. Numbers and Numerals: A Story Book for Young and Old. Washington: National Council of Teachers of Mathematics, 1961.