Grolier Incorporated, 1964
Buku Referensi
by Renzo Rossi
Macmillan, 1996
Buku Referensi
Reimann, Mathias, 1955-, author
Transnational Publishers, 1995
Buku Teks
edited by Langdon Lynne Faust
Ungar, 1988
Buku Referensi
Ewen, David, author
H.W. Wilson, 1962
Buku Referensi