Easterly, William Russell, author
The Penguin Press, 2006
Buku Teks
Mulvaney, D.J., author
Melbourne University Press, 1985
Buku Teks
Furstenberg, Friedrich, author
Leviathan House, 1974
Buku Teks
Meijer, Maarten, author
Seoul Hyeonamsa 2005
Buku Teks
Birkinshaw, Julian, author
Jossey-Bass, 2013
Buku Teks