Findling, John E,
Events that Changed America in the Eighteenth Century
Greenwood Press, 1998
 Buku Teks
Events that changed America through the seventeenth century
Greenwood Press, 2000
 Buku Teks
Rybczynski, Witold
A clearing in the distance : Frederick Law Olmsted and America in the nineteenth century / Witold Rybczynski
Simon & Schuster, 1999
 Buku Teks SO
Dulles, Foster Rhea
Twentieth century America
Houghton-Mifflin, 1945
 Buku Teks SO
DeVane, William Clyde
Higher education in twentieth-century America
Harvard University Press, 1965
 Buku Teks