Mullerson, Rein
Routledge, 1997
Buku Teks
Oudendyk, William J., author
Peter Davies, 1939
Buku Teks
Kennan, George F., 1904-, author
A Mentor Book, 1951
Buku Teks
Booth, Ken, author
George Allen and Unwin, 1985
Buku Teks
Kissinger, Henry, 1923-, author
Touchstone, 1994
Buku Teks