Citazione Stile APA (7a Edizione)

Spiro, E. (1971). Gehlen: Spy of the century. Random House.

Citazione stile Chigago Style (17a edizione)

Spiro, Edward. Gehlen: Spy of the Century. New York: Random House, 1971.

Citatione MLA (9a ed.)

Spiro, Edward. Gehlen: Spy of the Century. Random House, 1971.