APA (7e ed.) Bronvermelding

Billstein, R., Libeskind, S., & Lott, J. W. (2000). A problem solving approach to mathematics for elementary school teachers (7th ed.). Addison Wesley Longman.

Chicago (17e ed.) Bronvermelding

Billstein, Rick, Shlomo Libeskind, en Johnny W. Lott. A Problem Solving Approach to Mathematics for Elementary School Teachers. 7th ed. Boston: Addison Wesley Longman, 2000.

MLA (9e ed.) Bronvermelding

Billstein, Rick, et al. A Problem Solving Approach to Mathematics for Elementary School Teachers. 7th ed. Addison Wesley Longman, 2000.