Knoll, J. H., & Siebert, H. (1967). Wilhelm von Humboldt: Poltician and educationist 1767-1967. Inter Nationes.
Chicagoスタイル(17版)引用形式Knoll, Joachim H., , Horst Siebert. Wilhelm Von Humboldt: Poltician and Educationist 1767-1967. Bad Godesberg: Inter Nationes, 1967.
MLA(8版)引用形式Knoll, Joachim H., , Horst Siebert. Wilhelm Von Humboldt: Poltician and Educationist 1767-1967. Inter Nationes, 1967.
警告: この引用は必ずしも正確ではありません.