edited by Howard Giles
Cambridge University Press, 2016
Buku Teks
edited by Shari Miller, Leslie D. Leve and Patricia K. Kerig
Springer, 2012
eBooks
Tubbs, Stewart L., author
McGraw-Hill, 2008
Buku Teks
Martin, Judith N., author
McGraw-Hill, 2013
Buku Teks
edited Martin Lea
Harvester Wheatscheaf, 1992
Buku Teks