Cita APA (7a ed.)

Bullock, R., Little, M., & Millham, S. (1991). The care careers of extremely difficult and disturbed adolescents.

Cita Chicago Style (17a ed.)

Bullock, Roger, Michael Little, y Spencer Millham. The Care Careers of Extremely Difficult and Disturbed Adolescents. 1991.

Cita MLA (9a ed.)

Bullock, Roger, et al. The Care Careers of Extremely Difficult and Disturbed Adolescents. 1991.