Murray, Simon
Pan Books, 2000
Buku Teks
Murray, K. M. Elisabeth (Katherine Maud Elisabeth), 1909-1998, author
Yale University Press, 1977
Buku Teks
Pickles, Dorothy Maud
ssued under the auspices of the Royal Institute of International Affairs (by) Oxford U.P, 1966
Buku Teks
Schuman, Frederick L., author
Whittlesey House, 1931
Buku Teks
edited by Francis West
Oxford University Press, 1970
Buku Teks