Ch 7 in: McGregor, S. (2018). Literature review. In Understanding and evaluating research (pp. 177-204). SAGE Publications, Inc, https://www-doi-org.saintleo.idm.oclc.org/10.4135/9781071802656
Allen, M. (2017). The sage encyclopedia of communication research methods (Vols. 1-4). Thousand Oaks, CA: SAGE Publications, Inc doi: 10.4135/9781483381411