May, Cathie Rosemary
James Cook University, 1984
Buku Teks
State Public Relation Bureua, 1979
Buku Teks
Robertson, Ben, author
University of queensland press, 2010
Buku Referensi
E.E. Schaefer
State Public Relations Bureau, 1976
Buku Referensi
Horton, Mervyn, editor
Fine arts press, 1983
Buku Referensi