GC: n

S: http://www.yourarticlelibrary.com/international-politics/international-morality-role-of-international-morality-in-international-politics/48485/ (last access: 22 August 2015); http://nw18.american.edu/~dfagel/Class%20Readings/Morgenthau/Morgenthau_The%20Twilight%20Of%20International%20Morality.pdf (last access: 22 August 2015).

N:
S:

SYN:
S:

CR: moral imperative