Jordan, Peter, author
Gower, 1998
Buku Teks
Platt, Nathaniel, author
Prentice-Hall, 1964
Buku Teks
Randall, Geoffrey, author
Crest, 2001
Buku Teks
Matthews, Joseph R., author
Libraries Unlimited, 2004
Buku Teks
Matthews, Joseph R., author
Libraries Unlimited, 2004
Buku Teks