MLA

Felmer, Boris Koichu, and Peter Liljedahl. Problem Solving In Mathematics Instruction and Teacher Professional Development. Springer International Publishing, 2019.

APA

Felmer, F., Koichu, B., & Liljedahl, P. (2019). Problem Solving in Mathematics Instruction and Teacher Professional Development. Springer International Publishing.

Chicago

Felmer, Boris Koichu, and Peter Liljedahl. Problem Solving In Mathematics Instruction and Teacher Professional Development. : Springer International Publishing, 2019.