Blair, Sheila S
Sheila S, 1994
Buku Teks
Bloom, Jonathan
BBC Worldwide, 2000
Buku Teks
edited by Markus Hattstein, Peter Delius
Konemann, 2000
Buku Referensi
edited by George Ansell, Markus Hattstein, Peter Delius
H.F. Ullmann, 2010
Buku Referensi
Hiltrop, Jean Marie
Prentice-Hall, 1995
Buku Teks