Malik, C.P.
Kalyani Publisher, 1982
Buku Teks
Mohr, Hans, 1930-, author
Springer-Verlag, 1995
Buku Teks
Salisbury, Frank B., author
Wadsworth, 1985
Buku Referensi
Rao, K.N., author
S. Chand & Co, 1970
Buku Teks
Meyer, Bernard S., author
D. Van Nostrand, 1962
Buku Teks