References

Babbie, E. (2010). The practice of social research (12th  ed.). Belmont, CA: Wadsworth.

McKay, S. (2015, April 13). Are you using a questionnaire or survey to collect data? Retrieved from https://www.surveygizmo.com/resources/blog/taking-the-question-out-of-questionnaires/

Palys, T., & Atchison, C. (2014). Research decisions: Quantitative, qualitative, and mixed methods approaches (5th ed.). Toronto, Canada: Nelson Education.

Saylor Academy. (2012).  Principles of sociological inquiry; Qualitative and quantitative methods. Washington, DC: Saylor Academy. Retrieved from https://www.saylor.org/site/textbooks/Principles%20of%20Sociological%20Inquiry.pdf