Barber, J. D. (1972). The presidential character: Predicting performance in the White House. Prentice-Hall.
Citace podle Chicago (17th ed.)Barber, James David. The Presidential Character: Predicting Performance in the White House. Englewood Cliffs: Prentice-Hall, 1972.
Citace podle MLA (9th ed.)Barber, James David. The Presidential Character: Predicting Performance in the White House. Prentice-Hall, 1972.
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