Gellhorn, Walter, author
Macmillan, 1961
Buku Teks
Wright, Benjamin F., author
Phoenik Books, 1967
Buku Teks
Mendelson, Wallace, author
Dorsey Press, 1980
Buku Teks
Hazlitt, Henry
Whittlesey House, 1942
Buku Teks
edited by Carl J. Friedrich, Robert G. McCloskey
The Liberal Arts Press, 1954
Buku Teks