Dyfyniad APA

Siegel, L. J., & Worrall, J. L. (2013). Essentials of criminal justice (8th ed.). Wadsworth, Cengage Learning.

Dyfyniad Arddull Chicago

Siegel, Larry J., and John L. Worrall. Essentials of Criminal Justice. 8th ed. Belmont, Calif: Wadsworth, Cengage Learning, 2013.

Dyfyniad MLA

Siegel, Larry J., and John L. Worrall. Essentials of Criminal Justice. 8th ed. Wadsworth, Cengage Learning, 2013.

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