Lim, Yong Joo, author
Korea Seoul Daewonsa, 2006
Buku Teks
Kim, Hei-kyung, author
Gyonggi-do: Yeol Hwa Dan, 2005
Buku Teks
McDermott, Lynda Caryl, author
American Society for Training and Development, 2008
eBooks
Jeong, In-hyeong, author
Munhakkwajiseongsa, 2012
Buku Teks
Lee, Son-a, author
Kkum na r, 1996
Buku Teks