edited by A.M. Warnes
John Wiley & Sons, 1982
Buku Teks SO
Taylor and Francis, 2018
Buku Teks SO
Darren P Smith, Nissa Finney, Keith Halfacree
Routledge, 2016
Buku Teks SO
edited by Daniel W. Harrington, Sara McLafferty and Susan J. Elliott
Routledge, Taylor & Francis Group, 2017
Buku Teks SO
edited by Denis Dwyer
Longman, 1990
Buku Teks SO