Julia Chance, Torsten Schmiedeknecht
Wiley-Academy, 2001
Buku Teks
Sheard, Rod, author
Spon Press, 2001
Buku Teks
Shead, Rod, author
Spon Press, 2001
Buku Teks
Adam, Hubertus, author
Dumont Monte, 2001
Buku Teks
BooQs publisher data, 2010
Buku Referensi