Cookridge, E. H. (1972). Gehlen: Spy of the century / by E. H. Cookridge. Random House.
Chicagoスタイル(17版)引用形式Cookridge, E. H. Gehlen: Spy of the Century / by E. H. Cookridge. New York: Random House, 1972.
MLA(8版)引用形式Cookridge, E. H. Gehlen: Spy of the Century / by E. H. Cookridge. Random House, 1972.
警告: この引用は必ずしも正確ではありません.