Froelich, G. W., Bartkovich, K. G., Foester, P. A., & Hirsch, C. R. (1991). Connecting mathematics. National Council of Teachers of Mathematics.
Citace podle Chicago (17th ed.)Froelich, Gary W., Kevin G. Bartkovich, Paul A. Foester, a Christian R. Hirsch. Connecting Mathematics. Reston, VA: National Council of Teachers of Mathematics, 1991.
Citace podle MLA (9th ed.)Froelich, Gary W., et al. Connecting Mathematics. National Council of Teachers of Mathematics, 1991.
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