Svanberg, Sune, author
Springer-Verlag, 1992
Buku Teks
Smyth, Henry DeWolf
Princeton University Press, 1946
Buku Teks
Moruzzi, V.L., author
Pergamon Press, 1978
Buku Teks
Butcher, David J.
John Wiley & Sons, 1998
Buku Teks
Hewlett, Richard G., author
Pennsylvania State University Press, 1962
Buku Referensi