Dyfyniad APA

.Dryfoos, J. G. (1990). Adolescents at risk: Prevalence and prevention. Oxford University Press.

Dyfyniad Arddull Chicago

.Dryfoos, Joy G. Adolescents at Risk: Prevalence and Prevention. New York: Oxford University Press, 1990.

Dyfyniad MLA

.Dryfoos, Joy G. Adolescents at Risk: Prevalence and Prevention. Oxford University Press, 1990.

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