APA (7e ed.) Bronvermelding

Billstein, R., Libeskind, S., & Lott, J. W. (1993). A problem solving approach to mathematics for elementary school teachers. Addison-Wesley.

Chicago (17e ed.) Bronvermelding

Billstein, Rick, Shlomo Libeskind, en Johnny W. Lott. A Problem Solving Approach to Mathematics for Elementary School Teachers. Reading, MA: Addison-Wesley, 1993.

MLA (9e ed.) Bronvermelding

Billstein, Rick, et al. A Problem Solving Approach to Mathematics for Elementary School Teachers. Addison-Wesley, 1993.