MLA

Felmer, Patricio; Pehkonen, Erkki; Kilpatrick, Jeremy, Jeremy Kilpatrick, and Erkki Pehkonen. Posing and Solving Mathematical Problems. Springer International Publishing, 2016.

APA

Felmer, J., Kilpatrick, J., & Pehkonen, E. (2016). Posing and Solving Mathematical Problems. Springer International Publishing.

Chicago

Felmer, Patricio; Pehkonen, Erkki; Kilpatrick, Jeremy, Jeremy Kilpatrick, and Erkki Pehkonen. Posing and Solving Mathematical Problems. : Springer International Publishing, 2016.