Cullingworth, J.B., author
Allen & Unwin, 1979
Buku Teks
edited by Hersh Zeifman and Cynthia Zimmerman
Macmillan, 1993
Buku Teks
State Public Relation Bureua, 1979
Buku Teks
by John Macsai ... [and others] ; illustrator, Alfred J. Hidvegi
Wiley, 1976.
Buku Teks
Nancy LoPatin-Lummis, editor
Wiley-Blackwell, 2008
Buku Teks SO