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 & 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