Austin, Dennis
Routledge , 1922
Buku Teks
edited by William Walsh
Clarendon Press, 1973
Buku Teks
Larson, Laurence M., author
Holt , 1926
Buku Teks
Mansergh, Nicholas, author
Royal Institute Of International Affair, 1954
Buku Teks
Masefield, Muriel, author
G. Bell and Sons, 1954
Buku Teks