Edited by Eiichi Taniguchi
Routledge, 2015
Buku Teks
edited by Peter Roberts and Hugh Sykes
Sage, 2003
Buku Referensi
edited by Peter Roberts, Hugh Sykes
Sage Publications, 2003
Buku Referensi
McGraw-Hill, 2000
Buku Teks
Powell, Kenneth
te Neues, 2000
Buku Teks SO