Nelson, James G., author
Twayne, 1966
Buku Teks
Speaight, R., author
Arthur Barker, 1954
Buku Teks
Maurois, A. (Andre), author
E.P. Dutton & co., Inc., 1959
Buku Referensi
Watt, Alan
Angus and Robertson in Association with the Australian Institute of International Affairs, 1972
Buku Teks
[T.t.] Unesco 1961
Buku Teks