APA Edition Citation

Shoemaker, P. J., & Vos, T. P. (2009). Gatekeeping theory. Routledge.

Chicago Edition Citation

Shoemaker, Pamela J., and Tim P. Vos. Gatekeeping Theory. New York: Routledge, 2009.

MLA Edition Citation

Shoemaker, Pamela J., and Tim P. Vos. Gatekeeping Theory. Routledge, 2009.