Cita APA (7th ed.)

Hansen, A. (2014). Children's errors in mathematics (3rd edition.). SAGE.

Cita Chicago (17th ed.)

Hansen, Alice. Children's Errors in Mathematics. 3rd edition. Los Angeles: SAGE, 2014.

Cita MLA (9th ed.)

Hansen, Alice. Children's Errors in Mathematics. 3rd edition. SAGE, 2014.