Styl cytowania APA

Helm, S. (2007). A life in secrets: Vera Atkins and the missing Agents of WW II - A Story of the men and women who waged Churchill's secret war. Anchor Books.

Styl cytowania Chicago

Helm, Sarah. A Life in Secrets: Vera Atkins and the Missing Agents of WW II - A Story of the Men and Women Who Waged Churchill's Secret War. New York: Anchor Books, 2007.

Styl cytowania MLA

Helm, Sarah. A Life in Secrets: Vera Atkins and the Missing Agents of WW II - A Story of the Men and Women Who Waged Churchill's Secret War. Anchor Books, 2007.