APA citiranje

Helm, W. P. (1947). Harry truman: A political biography. New York: Duell, Sloan and Pearce.

Trích dẫn kiểu Chicago

Helm, William P. Harry Truman: A Political Biography. New York: Duell, Sloan and Pearce, 1947.

MLA citiranje

Helm, William P. Harry Truman: A Political Biography. New York: Duell, Sloan and Pearce, 1947.