edited by Pavlos Kanaroglou, Eric Delmelle and Antonio Páez
Routledge, 2018
Buku Teks SO
edited by Daniel W. Harrington, Sara McLafferty and Susan J. Elliott
Routledge, Taylor and Francis Group, 2017
Buku Teks SO
edited by Noel Castree, David Demeritt, DianaLiverman, Bruce Rhoads
Wiley-Blackwell, 2009
Buku Referensi
Andrews, Gavin J., 1970-
Routledge, Taylor & Francis Group, 2018
Buku Teks SO
edited by John A. Agnew, James S. Duncan
Wiley-Blackwell, 2011
Buku Teks