Barber, J. D. (1972). The presidential character: Predicting performance in the White House. Prentice-Hall.
Citazione stile Chigago Style (17a edizione)Barber, James David. The Presidential Character: Predicting Performance in the White House. Englewood Cliffs: Prentice-Hall, 1972.
Citatione MLA (9a ed.)Barber, James David. The Presidential Character: Predicting Performance in the White House. Prentice-Hall, 1972.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.