Phillips, Charles F., author
University of North Carolina , 1963
Buku Teks
Knorr, K.E., author
Stanford University Press, 1945
Buku Teks
Buku Teks
Lustbader, Eric V
New York:, 1990
Buku Teks
Doyle, Arthur Conan, 1859-1930, author
Longmas, 1950
Buku Teks