Lee, Won-jun
Gyore ui kheun seseung Kim Gu = (big mentor fellow) Kim Gu
Jakeun Ssiat, 2009
 Buku Teks
Sylff Directory: fellow and faculty Associates 1995
 Buku Referensi
Kyohaksa Editorial
Sogdam 3000 = fellow 3000 / Kyohaksa editorial side
Kyohaksa, 2003
 Buku Referensi
Allen, Frederick Lewis
The Big Change
Bantam Books, 1961
 Buku Teks
Sobolev, Leonid
Big Refit
Moscow : Progress Publishers, 1965
 Buku Teks