Institute Studies, 1984
Buku Teks
Davidson, Jamie S.
Cambridge University Press, 2015
eBooks
William I. Hitchcock, Melvyn P. Leffler, Jeffrey W. Legro.
Massachusetts Harvard University Press, 2016
Buku Teks
The John HopkinsPress, 1964
Buku Teks
Robinson, Marguerite S.
Cambridge University Press, 1975
Buku Teks