APA (7th ed.) Citation

Bokun, B. (1973). Spy in the Vatican, 1941-45. Vita Bks.

Chicago Style (17th ed.) Citation

Bokun, Branko. Spy in the Vatican, 1941-45. London: Vita Bks, 1973.

MLA (9th ed.) Citation

Bokun, Branko. Spy in the Vatican, 1941-45. Vita Bks, 1973.