Decker, William Merrill
University of North Carolina Press, 1990
Buku Teks
Adams, Henry
Houghton Miffiln, 1918
Buku Teks
Adams, Henry H.
Paperback Library, 1969
Buku Teks
Chamberlin, William Henry
Duckworth, 1940
Buku Teks
Adams, Henry Carter
Columbia University Press, 1954
Buku Teks