Sandburg, Carl
Harcourt Brace, 1939
Buku Teks
Schlesinger, Arthur Meier
Fawcett Publications, 1965
Buku Teks
Fersh, Seymour H.
Public Affairs, 1961
Buku Teks
Stockdale, James B.
Stanford University, 1984
Buku Teks
Caro, Robert A.
Alfred A. Knopf, 1983
Buku Teks