Smith, Karl J., author
Brooks/Cole, 1985
Buku Teks
Holt, Rinehard and Winston, Inc.
Holt, Rinehart and Winston,Inc, 1966
Buku Teks
Holt, Rinehart and Winston, 1966
Buku Referensi
Hammond, W. Rogers (William Rogers), 1920-1990, author
Prentice-Hall, 1961
Buku Teks
McCarthy, Michael, author
Erlangga, 2002
Buku Teks