Sách Tham khảo (NNA-DH)

1978, R R Jordan and Alan Matthews, Department of Education, University of Manchester

1993, Randee Falk

1997, Simon Sweeney

2002, Mark Powell

2006, Sam McCarter, Norman Whitby

2007, Evan Frendo, Sean Mahoney

2009, Sarah Jones, Macziola, Greg White, Biên dịch: Lê Minh Cẩn

2010, Brooks Margaret, Scanlon Jaimie

1991, Đắc Sơn

1995, Jack C. Richards

1997, Simon Sweeney

2003, Sue Brioux Aldcorn, Deborah Gordon, Andrew Happer, Jack C. Richards

2007, Simon Sweeney

2008, Rosemary Richey

2010, Dellar Hugh, Walkley Andrew

2010, Gillian D. Brown and Sally Rice

1992, Susan Sheerin, Jonathan Seath, GiIIian White

1996, Jeremy Comfort

1997, Simon Sweeney

2006, KS. Châu Văn Trung

2007, Mason Catherine, Atkins Rosemary

2008, Amy Krois-Lindner, Matt Firth and TransLegal

2010, Brooks Margare, Scanlon Jaimie

2011, Brooks Margaret, Scanlon Jaimie