Billstein, R., Libeskind, S., & Lott, J. W. (2001). A problem solving approach to mathematics for elementary school teachers (7th ed.). Addison Wesley.
Citace podle Chicago (17th ed.)Billstein, Rick, Shlomo Libeskind, a Johnny W. Lott. A Problem Solving Approach to Mathematics for Elementary School Teachers. 7th ed. Boston, MA: Addison Wesley, 2001.
Citace podle MLA (9th ed.)Billstein, Rick, et al. A Problem Solving Approach to Mathematics for Elementary School Teachers. 7th ed. Addison Wesley, 2001.
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