Crisp, Barbara, author
Rockport, 1998
Buku Teks
Mingue, Josep MarĂa, author
Monsahop, 2011
Buku Referensi
Million, Dian, 1950-, author
The University of Arizona Press, 2013
Buku Teks
Rafal, Serge, author
Octopus Publishing Group, 2003
Buku Teks
Kanter, Donald L. (Donald Lucky), 1925-, author
Jossey-Bass, 1989
Buku Teks