Dyfyniad APA

Spiegel, M. R., & Stephens, L. J. (2008). Statistics/4th ed. Tata McGraw Hill Education.

Dyfyniad Arddull Chicago

Spiegel, Murray R., and Larry J. Stephens. Statistics/4th Ed. NewDelhi: Tata McGraw Hill Education, 2008.

Dyfyniad MLA

Spiegel, Murray R., and Larry J. Stephens. Statistics/4th Ed. Tata McGraw Hill Education, 2008.

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