Cita APA (7th ed.)

Ehlers, A., Clark, D., Hackmann, A., McManus, F., Fennell, M., Herbert, C., & Mayou, R. (2003). A randomized controlled trial of cognitive therapy, a self-help booklet, and repeated assessments as early interventions for posttraumatic stress disorder.

Cita Chicago (17th ed.)

Ehlers, A., D. Clark, A. Hackmann, F. McManus, M. Fennell, C. Herbert, i R. Mayou. A Randomized Controlled Trial of Cognitive Therapy, a Self-help Booklet, and Repeated Assessments as Early Interventions for Posttraumatic Stress Disorder. 2003.

Cita MLA (9th ed.)

Ehlers, A., et al. A Randomized Controlled Trial of Cognitive Therapy, a Self-help Booklet, and Repeated Assessments as Early Interventions for Posttraumatic Stress Disorder. 2003.