APA (7e ed.) Bronvermelding

Helms, C., & Black, C. M. (2013). An intriguing life: A memoir of war, Washington, and marriage to an American spymaster. Rowman & Littlefield Publishers.

Chicago (17e ed.) Bronvermelding

Helms, Cynthia, en Christine M. Black. An Intriguing Life: A Memoir of War, Washington, and Marriage to an American Spymaster. Lanham: Rowman & Littlefield Publishers, 2013.

MLA (9e ed.) Bronvermelding

Helms, Cynthia, en Christine M. Black. An Intriguing Life: A Memoir of War, Washington, and Marriage to an American Spymaster. Rowman & Littlefield Publishers, 2013.