Knaap, Gerrit
Leiden KITLV Press 2004
Buku Teks
The Press of Case Western Reserve University, 1972
Buku Teks
The Press of Case Western Reserve University, 1973
Buku Teks
Willey, Basil
Penguin Books, 1962
Buku Teks
Brugge, CJM Lubbers-Van der
Groningen Wolters 1951
Buku Teks