Alfred A. Knopf, 1983
Buku Teks
edited by Frank Freidel and Norman Pollack
Rand McNally, 1963
Buku Teks
Graebner, Norman A.
McGraw-Hill, 1975
Buku Teks
Current, Richard N.
Alfred A. Knopf, 1965
Buku Teks
Bailey, Thomas Andrew, 1902-1983
D.C. Health, 1983
Buku Teks