1. Anderson JA. Thinking qualitatively: hermeneutics in science. In: Stacks DW, Salwen MB, editors. An integrated approach to communication theory and research. 2nd ed. Routledge: Taylor & Francis; 2009.
2. Baggini J, Fosl P. The philosopher’s toolkit. A compendium of philosophical concepts and methods. Malden, MA: Blackwell; 2003.
3. Campbell DT, Stanley JC. Experimental and quasi-experimental designs for research. Boston: Houghton Mifflin; 1963.
4. Brunswik E. Representative design and probabilistic theory in a functional psychology. Psychol Rev. 1955;62(3):193–217.
5. Brunswik E. Perception and the representative design of psychological experiments. 2nd ed. Berkeley, CA: University of California Press; 1956.