Hoover, H. (1958). The ordeal of Woodrow Wilson: By Herbert Hoover (4. print.). McGraw-Hill.

Hoover, Herbert. The Ordeal of Woodrow Wilson: By Herbert Hoover. 4. print. New York [u.a.]: McGraw-Hill, 1958.

Hoover, Herbert. The Ordeal of Woodrow Wilson: By Herbert Hoover. 4. print. McGraw-Hill, 1958.