edited by Colin M. Turnbull
Kingsport Press, 1973
Buku Teks
edited by C. Grove Haines
John Hopkins Press, 1956
Buku Teks
Schatten, Fritz, author
Frederick A. Praeger, 1966
Buku Teks
Carter, Gwendalen M.
Harcourt, Brace ,
Buku Teks
Gunther, John, 1901-1970, author
Hamish Hamilon, 1955
Buku Teks