APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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