Παραπομπή σε μορφή APA (7η εκδ.)

Hackmann, A., Ehlers, A., Speckens, A., & Clark, D. (2004). Characteristics and content of intrusive memories in PTSD and their changes with treatment.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Hackmann, A., A. Ehlers, A. Speckens, και D. Clark. Characteristics and Content of Intrusive Memories in PTSD and Their Changes with Treatment. 2004.

Παραπομπή σε μορφή MLA (9th εκδ.)

Hackmann, A., et al. Characteristics and Content of Intrusive Memories in PTSD and Their Changes with Treatment. 2004.