Jean M. Williams, editor
Mayfield Pub. Co, 2001
Buku Teks
edited by Jean M. Williams, Vikki Krane
McGraw-Hill, 2015
Buku Teks
Blanchard, Kendall
Bergin & Garvey, 1995
Buku Teks
Peter Craig
Learning matters Ltd., 2010
Buku Teks
David R. Mottram, editor
Routledge, 2011
Buku Teks