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Gatekeeping Theory is written by Pamela J. Shoemaker and published by Routledge. It's available with International Standard Book Number or ISBN identification 1135860602 (ISBN 10) and 9781135860608 (ISBN 13).
Gatekeeping Theory examines the process by which the billions of messages that are available in today's media world get cut down and transformed into the hundreds of messages that reach a given person on a given day.