Não informado. (1891). American school board journal. American School Board.
Chicagoスタイル(17版)引用形式Não informado. American School Board Journal. Milwaukee, Wis: American School Board, 1891.
MLA(8版)引用形式Não informado. American School Board Journal. American School Board, 1891.
警告: この引用は必ずしも正確ではありません.