edited by Lance Day, Ian McNeil
Routledge, 1996
Buku Referensi
Snyder, Houis L.
Princeton University Press, 1964
Buku Teks
Routledge, 1995
Buku Teks
Nahm, Andrew C., author
Scarecrow Press, 2004
Buku Teks
Pushkarev, S. G. (Sergei Germanovich), 1888-1980, compiler
Yale University Press, 1970
Buku Referensi