Billstein, R., Libeskind, S., & Lott, J. W. (1997). A problem-solving approach to mathematics for elementary school teachers: Instructor's resource guide (6th ed.). Addison-Wesley.
Citazione stile Chigago Style (17a edizione)Billstein, Rick, Shlomo Libeskind, e Johnny W. Lott. A Problem-solving Approach to Mathematics for Elementary School Teachers: Instructor's Resource Guide. 6th ed. Reading, MA: Addison-Wesley, 1997.
Citatione MLA (9a ed.)Billstein, Rick, et al. A Problem-solving Approach to Mathematics for Elementary School Teachers: Instructor's Resource Guide. 6th ed. Addison-Wesley, 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.