Eckley. Lincoln's Forgotten Friend, Leonard Swett. Southern Illinois University Press.
Chicagoスタイル(17版)引用形式Eckley. Lincoln's Forgotten Friend, Leonard Swett. Southern Illinois University Press.
MLA(8版)引用形式Eckley. Lincoln's Forgotten Friend, Leonard Swett. Southern Illinois University Press.
警告: この引用は必ずしも正確ではありません.