Tucker, R. W. (1968). Nation or empire? The debate over American foreign policy. Washington: The John Hopkins University.
Dyfyniad Arddull ChicagoTucker, Robert W. Nation or Empire? The Debate Over American Foreign Policy. Washington: The John Hopkins University, 1968.
Dyfyniad MLATucker, Robert W. Nation or Empire? The Debate Over American Foreign Policy. Washington: The John Hopkins University, 1968.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.