Não informado. (1930). Journal of School Health. American School Health Association.
Chicago-Zitierstil (17. Ausg.)Não informado. Journal of School Health. Kent, Ohio: American School Health Association, 1930.
MLA-Zitierstil (8. Ausg.)Não informado. Journal of School Health. American School Health Association, 1930.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.