Crowder, L.V., author
UGM Press, 1986
Buku Teks
Rao, K.N., author
S. Chand & Co, 1970
Buku Teks
Meyer, Bernard S., author
D. Van Nostrand, 1962
Buku Teks
Matthews, R.E.F., author
Academic Press, 1992
Buku Teks
Goodwin, T.W., author
Pergamon Press, 1983
Buku Teks