Singer, F., Ellerton, N. F., & Cai, J. (2015). Mathematical problem posing: From research to effective practice. Springer.
Chicago Style (17th ed.) CitationSinger, Florence, Nerida F. Ellerton, and Jinfa Cai. Mathematical Problem Posing: From Research to Effective Practice. New York, NY [u.a.]: Springer, 2015.
MLA (9th ed.) CitationSinger, Florence, et al. Mathematical Problem Posing: From Research to Effective Practice. Springer, 2015.
Warning: These citations may not always be 100% accurate.