Dyfyniad APA

Spiegel, M. R., & Stephens, L. J. (2010). Statistics/4th ed. Tata McGraw Hill.

Dyfyniad Arddull Chicago

Spiegel, Murray R., and Larry J. Stephens. Statistics/4th Ed. New Delhi: Tata McGraw Hill, 2010.

Dyfyniad MLA

Spiegel, Murray R., and Larry J. Stephens. Statistics/4th Ed. Tata McGraw Hill, 2010.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.