Hatcher, Jeffrey, author
Story Press, 1996
Buku Teks
Shannon, Faith, author
Reed International Books, 1987
Buku Referensi
Landau, Sidney I., author
Cambridge University Press, 2001
Buku Referensi
Krevitsky, Nik, author
Reinhold Book, 1964
Buku Teks
Alley, Michael
Springer-Verlag, 1996
Buku Teks