Beard, Charles A.
The Making of American civilization
Macmillan, 1948
 Buku Teks SO
Beard, Charles A.
The Making of American civilization
Macmillan, 1948
 Buku Teks SO
Scott, Andrew M.
Political thought in America
Holt, Rinehart & Winston, 1959
 Buku Teks
Liss, Sheldon B.
Radical thought in central America
Westview Press, 1991
 Buku Teks
Eldredge, Niles
Unfinished synthesis biological nierarchies and modern evolutionary thought
Oxford University Press, 1985
 Buku Teks