World Book, 1985
Buku Referensi
editor in chief, Paul Edwards
Macmilan , 1972
Buku Referensi
Kodansha, 1983
Buku Referensi
edited by Renato Dulbecco
Academic Press, 1991
Buku Referensi
Lagowski, Joseph J., editor-in-chief
MacMillan Reference USA, 1997
Buku Referensi