Weiner, E.S.C., compiler
Clarendon Press, 1993
Buku Referensi
Kramer, Melinda G., author
Prentice-Hall, 1995
Buku Referensi
Heffernan, James A. W., author
W.W. Norton & Company, 1990
Buku Referensi
Marius, Richard, author
McGraw-Hill, 1988
Buku Referensi
Heffernan, James A.W., author
W.W. Norton & Company, 1986
Buku Referensi