Saenz et al. (2012) study

Saenz, V., Hatch, D., Bukoski, B., Kim, S., Lee, K. & Valdez, P. (2012). Community college student engagement patterns: a typology revealed through exploratory cluster analysis. In Goodwin, J. (Ed.) (Ed.), SAGE secondary data analysis (pp. v2-179-v2-210). London: SAGE Publications Ltd First Published March, 2011