Luce, J.V.
Thames and Hudson , 1994
Buku Teks
Windelband, Wilhelm, author
Happer & Brothers, 1901
Buku Teks
Blackson, Thomas A., author
Wiley-Blackwell, 2011
Buku Teks
Sweet and Maxwell, 1975
Buku Teks
Josselin de Jong, J.P.B. de, author
Foris Publications, 1987
Buku Teks