Não informado. (1891). American school board journal. American School Board.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. American School Board Journal. Milwaukee, Wis: American School Board, 1891.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. American School Board Journal. American School Board, 1891.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.