Peterson, Brooks
Intercultural Press, 2004
Buku Teks SO
Kabagarama, Daisy
Allyn and Bacon, 1993
Buku Teks SO
Buono, Anthony F.
Jossey-Bass, 1989
Buku Teks SO
Helle Porsdam, editor
Edward Elgar, 2012
Buku Teks SO
edited by Anthony Milner and Mary Quilty
Oxford University Press, 1997
Buku Teks SO