Hill, Charles W.L., author
Houghton Miffiln, 1992
Buku Teks
Hill, Charles W.L., author
Houghton Miffiln, 2001
Buku Teks
Gannon, Martin J., author
Little, Brown & Co., 1982
Buku Teks
edited by Bart van Looy and Roland van Dierdonck
Pitman, 1998
Buku Teks
Hill, Charles W.L., author
Houghton Miffiln, 1998
Buku Teks