Παραπομπή σε μορφή APA (7η εκδ.)

Espie, C., Lindsay, W., Brooks, D., Hood, E., & Turvey, T. (1989). A controlled comparative investigation of psychological treatments for chronic sleep-onset insomnia.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Espie, C., W. Lindsay, D. Brooks, E. Hood, και T. Turvey. A Controlled Comparative Investigation of Psychological Treatments for Chronic Sleep-onset Insomnia. 1989.

Παραπομπή σε μορφή MLA (9th εκδ.)

Espie, C., et al. A Controlled Comparative Investigation of Psychological Treatments for Chronic Sleep-onset Insomnia. 1989.