Personal influence ; the part played by people in the flow of mass communications
by Elihu Katz and Paul F. Lazarsfeld. With a foreword by Elmo Roper.
New York : Free Press, [1955]
xx, 400 págs. ; 22 cm.
Serie: Foundations of communications research
"A report of the Bureau of Applied Social Research, Columbia University."
Bibliografía: p. 381-393.