Howe, Frederic C., author
Coward-McCann, 1936
Buku Teks
Will, Frederic
Twayne , 1969
Buku Teks
Benham, Frederic
New York, N.Y. Sir Issac Pitman 1941,
Buku Teks
Engels, Friedrich, 1820-1895, author
Fereign Languages Publishing House, 1954
Buku Teks
Milner, Frederic
Macmillan, 1931
Buku Teks