Não informado. (1930). Journal of School Health. American School Health Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Journal of School Health. Kent, Ohio: American School Health Association, 1930.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Journal of School Health. American School Health Association, 1930.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.