APA (7th ed.) Zitazioa

Understanding Sleep (Brain Basics). National Institute of Neurological Disorders & Stroke.

Chicago Style (17th ed.) Zitazioa

Understanding Sleep (Brain Basics). National Institute of Neurological Disorders & Stroke.

MLA (9th ed.) Zitazioa

Understanding Sleep (Brain Basics). National Institute of Neurological Disorders & Stroke.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.