Cita APA (7a ed.)

Sheldon, W. H., Hartl, E. M., & MacDermott, E. (1949). Varieties of delinquent youth. Harper & Brothers.

Cita Chicago Style (17a ed.)

Sheldon, William H., Emil M. Hartl, y Eugene MacDermott. Varieties of Delinquent Youth. New York: Harper & Brothers, 1949.

Cita MLA (9a ed.)

Sheldon, William H., et al. Varieties of Delinquent Youth. Harper & Brothers, 1949.