Não informado. (1891). American school board journal. American School Board.
Chicago-Zitierstil (17. Ausg.)Não informado. American School Board Journal. Milwaukee, Wis: American School Board, 1891.
MLA-Zitierstil (8. Ausg.)Não informado. American School Board Journal. American School Board, 1891.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.