A Maxwell McCombs & Donald Shaw, Elihu Katz & Paul Lazarsfeld, Harold Lasswell, David White
B Harold Lasswell, David White, Elihu Katz & Paul Lazarsfeld, Maxwell McCombs & Donald Shaw
C Elihu Katz & Paul Lazarsfeld, Harold Lasswell, David White, Maxwell McCombs & Donald Shaw
D Harold Lasswell, Elihu Katz & Paul Lazarsfeld, David White, Maxwell McCombs & Donald Shaw