Davis, Janet M., author
Oxford University Press, 2016
eBooks
Canfield, Leon H., author
Houghton Mifflin, 1954
Buku Teks
Funston, Richard Y.
Schenkman Publishing Company, Inc., 1977
Buku Teks
Quarles, Benjamin, author
Macmillan, 1969
Buku Teks
Nevins, Allan, 1890-1971, author
Macmillan, 1927
Buku Teks