edited by David J. Rothman and Sheila M. Rothman
Basic Books, 1975
Buku Teks
Graebner, Norman A., author
McGraw-Hill, 1975
Buku Teks
Sinclair, Andrew, author
Harper & Row, 1965
Buku Teks
edited by Harold F. Williamson
Prentice-Hall, 1951
Buku Teks
Robertson, Ross M., author
Harcourt, Brace & World, 1964
Buku Teks