Adam, Leonhard
Penguin Books, 1949
Buku Teks
Boas, Franz, 1858-1942
Dover Publication, 1955
Buku Teks
Harrison, Jane Ellen
University Press, 1948
Buku Teks
Bodrogi, Tiban
House of the Hungarian Academy of Sciences , 1961
Buku Teks
Routledge, 1993
Buku Teks