Campbell, K. M., & Steinberg, J. B. (2009). Difficult transitions: Foreign policy troubles at the outset of presidential power. Brookings Institution Press.
Dyfyniad Arddull ChicagoCampbell, Kurt M., và James B. Steinberg. Difficult Transitions: Foreign Policy Troubles At the Outset of Presidential Power. Brookings Institution Press, 2009.
Dyfyniad MLACampbell, Kurt M., và James B. Steinberg. Difficult Transitions: Foreign Policy Troubles At the Outset of Presidential Power. Brookings Institution Press, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.