(1968). About the Sudbury Valley School. Sudbury Valley School.
Chicagoスタイル(17版)引用形式About the Sudbury Valley School. [Framingham]: Sudbury Valley School, 1968.
MLA(8版)引用形式About the Sudbury Valley School. Sudbury Valley School, 1968.
警告: この引用は必ずしも正確ではありません.