Watt, Helen, author
Routledge , 2000
Buku Teks
Harris, Dean M., 1951-, author
Jossey-Bass, 2011.
Buku Teks
edited by Eileen E. Morrison, Beth Furlong
Jones & Bartlett Learning, 2014
Buku Teks
Olden, Peter C., author
AUPHA Press, 2011
Buku Teks
Crezee, Ineke H.M, author
John Benjamins Publishing, 2013
Buku Teks