Downing, D., & Clark, J. (2009). Barron's E-Z statistics ([4th ed.].). Barron's.
Cita Chicago Style (17a ed.)Downing, Douglas, y Jeff Clark. Barron's E-Z Statistics. [4th ed.]. Hauppauge, N.Y.: Barron's, 2009.
Cita MLA (8a ed.)Downing, Douglas, y Jeff Clark. Barron's E-Z Statistics. [4th ed.]. Barron's, 2009.
Precaución: Estas citas no son 100% exactas.