Kenny, Anthony, author
Blackwell Publishing, 2007
Buku Teks
Dray, William H.
Prentice-Hall, 1993
Buku Teks
Kusch, Martin, author
Routledge, 1999
Buku Teks
Gomperz, Theodor, author
John Murray, 1949
Buku Teks
Gomperz, Theodor, author
John Murray , 1955
Buku Teks