Stark, Edward C., author
Glencoe, 1979
Buku Teks
Siebert, Eleanor D., author
McGraw-Hill, 1982
Buku Teks
Glinka, N., author
Mir Publisher, 1960
Buku Teks
Lowry, T. M., author
Macmillan, 1936
Buku Teks
Barrow, Gordon M., author
McGraw-Hill, 1996
Buku Teks