Munro, Dana G.
Greewood press, 1964
Buku Teks
Kissinger, Henry, 1923-, author
Schuter, 1994
Buku Teks
Ferrell, Robert H., author
W.W. Norton, 1959
Buku Teks
Jones, Howard, author
Franklin Watt , 1985
Buku Teks
Alstyne, Richard W. van
Stanford University Press, 1947
Buku Teks