Woodsworth, Anne, author
Gower, 1994
Buku Teks
Roberts, Sue, author
Facet Publishing, 2004
Buku Teks
Cricket Liu; Jerry Peek; Russ Jones; Bryan Buus; Adrian Nye
O'Reilly, 1994
Buku Teks
Gallacher, Cathryn, author
Aslib , 1999
Buku Teks
edited by Charles B. Inlander, Alan M. Rees
Oryx, 1991
Buku Teks