Pierce, James B., author
Houghton Mifflin, 1970
Buku Teks
Russell, John B., author
McGraw-Hill, 1981
Buku Teks
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