APA

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

Chicago

Dryfoos Joy G, . 1990. Adolescents at risk. Oxford: Oxford University Press.

Harvard

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

MLA

Dryfoos Joy G, . Adolescents at risk. Oxford: Oxford University Press. 1990.