Gonda, Jan, 1905-1991
Brill, 1975
Buku Teks SO
Korea Foundation, [date of publication not identified]
Buku Referensi
Bosch, F.D.K.
Martinus Nijhoff, 1961
Buku Teks
Schrieke, Bertram Johannes Otto
W. Van Hoeve, 1955
Buku Teks
Chan, F. Hilbert
Asian Research service, 1982
Buku Teks SO