Barber, J. D. (1972). The presidential character: Predicting performance in the White House. Prentice-Hall.
Cita Chicago (17th ed.)Barber, James David. The Presidential Character: Predicting Performance in the White House. Englewood Cliffs: Prentice-Hall, 1972.
Cita MLA (9th ed.)Barber, James David. The Presidential Character: Predicting Performance in the White House. Prentice-Hall, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.