Jeon, Gwan-Jin, author
LBH Gwoyugchulphansa, 2010
Buku Referensi
Olson, Everett C., author
University of Chicago Press, 1999
Buku Teks
Baerman, Matthew, author
Cambridge University Press, 2017
Buku Teks
Tracy, Brian, author
American Management Association, 2013
eBooks
Cambridge University Press, 2001
eBooks