APA(7版)引用形式
Orleans, J. (1926). A Study of the nature of difficulty. Columbia Univ.
Chicagoスタイル(17版)引用形式
Orleans, Jakob. A Study of the Nature of Difficulty. New York: Columbia Univ, 1926.
MLA(9版)引用形式
Orleans, Jakob. A Study of the Nature of Difficulty. Columbia Univ, 1926.
警告: この引用は必ずしも正確ではありません.