Boyle, Mary, author
Taylor and Francis, 2002
Buku Teks
Barradas, Gerald
Pageant Press , 1956
Buku Teks
Freedman, Paul, author
Public Affairs Press, 1950
Buku Teks
Engels, Friedrich, 1820-1895, editor
Foreign Languages Publishing House, 1958
Buku Teks
Madjelis Ilmu Pengetahuan Indonesia
Madjelis Ilmu Pengetahuan Indonesia, 1959
Buku Referensi