Cita APA (7a ed.)

Shoemaker, P. J. (c 1991). Gatekeeping Communication concepts.

Cita Chicago Style (17a ed.)

Shoemaker, Pamela J. "Gatekeeping." Communication Concepts c 1991.

Cita MLA (9a ed.)

Shoemaker, Pamela J. "Gatekeeping." Communication Concepts, c 1991.