People speak out
Rewi Alley, 1954
Buku Teks
Alberti, Robert E.
Stand up, speak out, talk back
Pocket Books, 1975
Buku Teks
Bocock, Robert
Hegemony
Jalasutra, 2007
Buku Teks
Bovee, Courtland L.
Business communication today
McGraw-Hill, 1993
Buku Teks
Bovee, Courtland L.
Business communication today
Prentice-Hall, 2005
Buku Teks