Cita APA (7th ed.)

Van de Walle, J. A., Karp, K., & Bay-Williams, J. M. (2013). Elementary and middle school mathematics: Teaching developmentally (8th ed.). Pearson.

Cita Chicago (17th ed.)

Van de Walle, John A., Karen Karp, i Jennifer M. Bay-Williams. Elementary and Middle School Mathematics: Teaching Developmentally. 8th ed. Boston: Pearson, 2013.

Cita MLA (9th ed.)

Van de Walle, John A., et al. Elementary and Middle School Mathematics: Teaching Developmentally. 8th ed. Pearson, 2013.