Choi, Chong-hun, author
Balhae Books, 2011
Buku Teks
Choi, Jong-hun, author
Kollibo, 2013
Buku Teks
Ostrowsky, O., author
ELBS, 1981
Buku Teks
edited by D.J. Weatherall, J.G.G. Ledingham, D.A. Warrell
Oxford University Press, 1987
Buku Teks
edited by A. Ghosh
E.J. Brill, 1990
Buku Referensi