editor, Paul Edwards
MacMilan, 1972
Buku Referensi
Americana Corporation, 1964
Buku Referensi
edited by Goerge Thomas Kurian, Graham T.T. Molitor
Macmillan Library Reference USA, 1996
Buku Referensi
Americana Corporation, 1977
Buku Referensi
Philipp Strazny, editor
Fitzroy Dearborn, 2005
Buku Referensi