edited by Robert D. Newcomb, Jerry L. Jolley
Charles C. Thomas, 1980
Buku Teks
by Nigel Malin [and others]
Open University Press, 1999
Buku Teks
edited by Dianne Watkins
Bailliere Tindall, 2003
Buku Teks
Chatburn, Robert L., author
Jones & Bartlett Learning, 2011
Buku Teks
A Milbank Resource Bock, 1973
Buku Teks