Billstein, R., Libeskind, S., & Lott, J. W. (1993). A problem solving approach to mathematics (5th ed.). Addison-Wesley Pub. Co.
Citace podle Chicago (17th ed.)Billstein, Rick, Shlomo Libeskind, a Johnny W. Lott. A Problem Solving Approach to Mathematics. 5th ed. Reading, Mass: Addison-Wesley Pub. Co, 1993.
Citace podle MLA (9th ed.)Billstein, Rick, et al. A Problem Solving Approach to Mathematics. 5th ed. Addison-Wesley Pub. Co, 1993.
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