1. Benson, J., & Hocevar, D. (1985). The impact of item phrasing on the validity of attitude scales for elementary school students. Journal of Educational Measurement, 22(3), 231–240.
2. Bloom, B., Englehart, M., Furst, E., Hill, W., & Krathwohl, D. (Ed.) (1956). Taxonomy of educational objectives: The classification of educational goals. Handbook I: Cognitive domain. New York: Longmans, Green.
3. Bruce, B. C., Weismann, M., & Novak, M. (1997). Science education outreach: Physics demonstrations, lectures and workshops. The Journal of Illinois Science Teachers Association, 23(2), 8–12.
4. Caleon, I. S., & Subramaniam, R. (2004). Liquid nitrogen turns down the temperature on gas-law demos. Physics Education, 39(4), 324–327.
5. Caleon, I. S., & Subramaniam, R. (2005). The impact of a cryogenics-based enrichment programme on attitude towards science and the learning of science concepts. International Journal of Science Education, 27(6), 679–704.