Anderson, E. W., Seguin, P., Suslow, V. Y., & Wright, D. W. (2000). Quantitative skills interactive. Irwin/McGraw-Hill.
Cita Chicago (17th ed.)Anderson, Eugene W., Paul Seguin, Valerie Y. Suslow, i David W. Wright. Quantitative Skills Interactive. Burr Ridge, Ill: Irwin/McGraw-Hill, 2000.
Cita MLA (9th ed.)Anderson, Eugene W., et al. Quantitative Skills Interactive. Irwin/McGraw-Hill, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.