Billstein, R., Liberskind, S., & Lott, J. W. (1993). A Problem solving approach to mathematics for elementary school teachers (5th ed.). Addison-Wesley.
Chicago-Zitierstil (17. Ausg.)Billstein, Rick, Shlomo Liberskind, und Johnny W. Lott. A Problem Solving Approach to Mathematics for Elementary School Teachers. 5th ed. Reading, Mass: Addison-Wesley, 1993.
MLA-Zitierstil (9. Ausg.)Billstein, Rick, et al. A Problem Solving Approach to Mathematics for Elementary School Teachers. 5th ed. Addison-Wesley, 1993.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.