Gaya APA
Suparmo, L.
(2011).
Crisi management & public relations/ Ludwig Suparmo
(
Cet.1)
.
Jakarta:
Erlangga.
Gaya MLA
Suparmo, Ludwig.
"Crisi management & public relations/ Ludwig Suparmo".
Cet.1
Jakarta:
Erlangga,
2011.
Text.