Shoemaker, P. J. (1991). Communication concepts 3 Gatekeeping. Sage Pub..
Citación estilo ChicagoShoemaker, Pamela J. Communication Concepts 3 Gatekeeping. Newbury Park: Sage Pub., 1991.
Cita MLAShoemaker, Pamela J. Communication Concepts 3 Gatekeeping. Sage Pub., 1991.
Warning: These citations may not always be 100% accurate.