Cita APA (7a ed.)
Lappan, G., Smith, M. S., & Jones, E. Rich and Engaging Mathematical Tasks: Grades 5-9. National Council of Teachers of Mathematics.
Cita estilo Chicago (17a ed.)
Lappan, Glenda, Margaret S. Smith, y Elizabeth Jones. Rich and Engaging Mathematical Tasks: Grades 5-9. Reston, EUA: National Council of Teachers of Mathematics.
Cita MLA (9a ed.)
Lappan, Glenda, et al. Rich and Engaging Mathematical Tasks: Grades 5-9. National Council of Teachers of Mathematics.
Precaución: Estas citas no son 100% exactas.