Angle, Paul M.
New York Rand M. Nally & Company 1954
Buku Teks
Bruce Michael Bagley, Roberto Alvarez, and Katherine J. Hagedorn, editors
Westview Press, 1985
Buku Teks
Thoreau, Henry David, 1817-1862, author
The Liberal Arts Press, 1945
Buku Teks
Miller, William, author
Prentice-Hall, 1964
Buku Teks
Viorst, Milton, author
Chilton Book, 1965
Buku Teks