APA (7th ed.) Zitazioa
KERR, S., & JOWETT, S. SLEEP PROBLEMS IN PRE-SCHOOL CHILDREN: A REVIEW OF THE LITERATURE.
Chicago Style (17th ed.) Zitazioa
KERR, S., eta S. JOWETT. SLEEP PROBLEMS IN PRE-SCHOOL CHILDREN: A REVIEW OF THE LITERATURE.
MLA (9th ed.) Zitazioa
KERR, S., eta S. JOWETT. SLEEP PROBLEMS IN PRE-SCHOOL CHILDREN: A REVIEW OF THE LITERATURE.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.