(1970). Perspective on our time: Issues and essays. Houghton Mifflin.
Chicagoスタイル(17版)引用形式Perspective on Our Time: Issues and Essays. Boston: Houghton Mifflin, 1970.
MLA(9版)引用形式Perspective on Our Time: Issues and Essays. Houghton Mifflin, 1970.
警告: この引用は必ずしも正確ではありません.