Rana, Narayan Chandra
Tata McGraw-Hill , 1994
Buku Teks
Phalen, Thomas E.
Rinehart and Winston, 1965
Buku Teks
Bullen, K.E.
Acience Press, 1954
Buku Teks
Morrison, J.L.M., author
Harlow Essex, UK ELBS, 1970
Buku Teks
Kittel, Charles, author
McGraw-Hill , 1981
Buku Teks