Cita APA (7a ed.)

Coleman, J. C. (1989). The focal theory of adolescence: A psychological perspective. The social world of adolescents, 43-56.

Cita Chicago Style (17a ed.)

Coleman, John C. "The Focal Theory of Adolescence: A Psychological Perspective." The Social World of Adolescents 1989: 43-56.

Cita MLA (8a ed.)

Coleman, John C. "The Focal Theory of Adolescence: A Psychological Perspective." The Social World of Adolescents, 1989, pp. 43-56.