Choi, Jong-hun
Unmil hage widae hage slumber = 은밀 하게 위대 하게
Kollibo, 2013
 Buku Teks
Ostrowsky, O.
Engineering drawing for technicians; vol. 1-2
ELBS, 1981
 Buku Teks
Oxford tektbook of medicine; Vol. 1-2
edited by D.J. Weatherall, J.G.G. Ledingham, D.A. Warrell
Oxford University Press, 1987
 Buku Teks
An encyclopedia of Indian archaeology; Vol. 1-2
edited by A. Ghosh
E.J. Brill, 1990
 Buku Referensi
Megaw, Thomas M.
Tunnels : planning, design, construction, vol. 1-2
John Wiley & Sons, 1982
 Buku Teks