APA

Scudder K. J., Beam K. S., . (1961). The twenty billion dollar challenge: a national program for delinquency prevention. New York: Putnam.

Chicago

Scudder Kenyon Judson, Beam Kenneth Stanley, . 1961. The twenty billion dollar challenge: a national program for delinquency prevention. New York: Putnam.

Harvard

Scudder K. J., Beam K. S., . (1961). The twenty billion dollar challenge: a national program for delinquency prevention. New York: Putnam.

MLA

Scudder Kenyon Judson, Beam Kenneth Stanley, . The twenty billion dollar challenge: a national program for delinquency prevention. New York: Putnam. 1961.