Bingham, Robert C., author
McGraw-Hill, 1987
Buku Teks
Traynham, James G., author
Prentice-Hall, 1991
Buku Teks
Cox, Dennis P., author
W. H. Freeman, 1965
Buku Teks
Rahn, Joan E., author
Cliffs Notes, 1969
Buku Teks
Smith, Genevieve Love, author
Delmar Publishers, 1991
Buku Teks