Happold, F.C.
Christophers, 1938
Buku Klasik
edited by Norman Page
Macmillan, 1991
Buku Teks
Barck,Oscar Theodore
Macmillan, 1950
Buku Teks
Barck, Oscar Theodore, Jr., 1902-1993, author
New York, N.Y. Macmullan c.1965,
Buku Teks
Fraser, R
Stockholm [etc.] Continental Books [1946]
Buku Teks