Copeland, Robert Allen
Chapman & Hall, 1993
Buku Teks
edited by Janet Holmes and Kirk Hazen
John Wiley & Sons, 2014
Buku Teks
Erika Hoff, editor
Wiely-Blackwell, 2012
Buku Teks
Jacobsen, Kathryn H.
Jones & Bartlett Learning, 2017
Buku Teks
edited by Catherine Cassel and Gillian Symon
Sage, 1995
Buku Teks