Dyfyniad APA
Spiegel, M. R., & Stephens, L. J. (2014). Statistics (5th ed.). McGraw-Hill.
Dyfyniad Arddull Chicago
Spiegel, Murray R., and Larry J. Stephens. Statistics. 5th ed. New York: McGraw-Hill, 2014.
Dyfyniad MLA
Spiegel, Murray R., and Larry J. Stephens. Statistics. 5th ed. McGraw-Hill, 2014.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.