Smith, D. E. (1900). The teaching of elementary mathematics QA11. Macmillan.
Citación estilo ChicagoSmith, David Eugene. The Teaching of Elementary Mathematics QA11. New York: Macmillan, 1900.
Cita MLASmith, David Eugene. The Teaching of Elementary Mathematics QA11. Macmillan, 1900.
Warning: These citations may not always be 100% accurate.