Spiro, E. (1971). Gehlen: Spy of the century. Random House.
Chicagoスタイル(17版)引用形式Spiro, Edward. Gehlen: Spy of the Century. New York: Random House, 1971.
MLA(9版)引用形式Spiro, Edward. Gehlen: Spy of the Century. Random House, 1971.
警告: この引用は必ずしも正確ではありません.