Williamson, H. F., & Smalley, O. A. (1957). Northwestern Mutual Life: A century of trusteeship. Northwestern University Press.
Chicagoスタイル(17版)引用形式Williamson, Harold Francis, , Orange A. Smalley. Northwestern Mutual Life: A Century of Trusteeship. Evanston, Ill: Northwestern University Press, 1957.
MLA(9版)引用形式Williamson, Harold Francis, , Orange A. Smalley. Northwestern Mutual Life: A Century of Trusteeship. Northwestern University Press, 1957.
警告: この引用は必ずしも正確ではありません.