Singer, F. M., Ellerton, N. F., & Cai, J. (2015). Mathematical problem posing: From research to effective practice (1a. ed.). Springer.
Citazione stile Chigago Style (17a edizione)Singer, Florence Mihaela, Nerida Fay Ellerton, e Jinfa Cai. Mathematical Problem Posing: From Research to Effective Practice. 1a. ed. Nueva York: Springer, 2015.
Citatione MLA (9a ed.)Singer, Florence Mihaela, et al. Mathematical Problem Posing: From Research to Effective Practice. 1a. ed. Springer, 2015.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.