Billstein, R., Libeskind, S., & Lott, J. W. (1990). A problem solving approach to mathematics for elementary school teachers (4th ed.). Benjamin/Cummings.
Chicago-Zitierstil (17. Ausg.)Billstein, Rick, Shlomo Libeskind, und Johnny W. Lott. A Problem Solving Approach to Mathematics for Elementary School Teachers. 4th ed. Redwood City, Calif: Benjamin/Cummings, 1990.
MLA-Zitierstil (9. Ausg.)Billstein, Rick, et al. A Problem Solving Approach to Mathematics for Elementary School Teachers. 4th ed. Benjamin/Cummings, 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.