MLA

Reed, Emily T Boyles, and Carol A Mullen. Problem-based Learning In Elementary School. Springer International Publishing, 2021.

APA

Reed, R., Boyles, E. T, & Mullen, C. A. (2021). Problem-Based Learning in Elementary School. Springer International Publishing.

Chicago

Reed, Emily T Boyles, and Carol A Mullen. Problem-Based Learning In Elementary School. : Springer International Publishing, 2021.