1. Abercrombie, M. (1960). The anatomy of judgement: An investigation into the process of perception and reasoning. London: Hutc.
2. Abrams, M. H. (1971). Natural supernaturalism: Tradition and revolution in romantic literature. New York: Norton.
3. Allchin, D. (2013). Teaching the nature of science. Perspectives and resources. St. Paul, MN: SHiPS Education Press.
4. Alsop, S., & Watts, M. (1997). A model of informal learning about radiation and radioactivity. Science Education, 81, 633–650.
5. Aristotle. (1998). The metaphysics. (Translated and introduction by Hugh Lawson-Tancred). London: Penguin books.