Eichelberger, Clark M.
Harper & Brothers, 1955
Buku Teks
New York University Press, 1950
Buku Teks
New York University Press, 1952
Buku Teks
Goodrich, Leland M.
Thomas Y. Crowell, 1961
Buku Teks
Coyle, David Cushman, 1887-1969
Columbia University Press, 1963
Buku Teks