Gallup, George, author
A Guide To Public Opinion Polls
Princeton University press, 1948
 Buku Teks
Albig, WIlliam
Public opinion
McGraw-Hill, 1939
 Buku Teks
Lane, Robert E., author
Public opinion
Prentice-Hall, 1964
 Buku Teks
Albig, WIlliam
Public opinion
McGraw-Hill, 1939
 Buku Teks
Doob, Leonard William, 1909-, author
Public opinion and propaganda
The Cresset Press, 1948
 Buku Teks
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