Levine, S., & Johnstone, L. (1996). Science around the world: Travel through time and space with fun experiments and projects. Wiley.
Chicago-viite (17. p.)Levine, Shar, ja Leslie Johnstone. Science Around the World: Travel Through Time and Space with Fun Experiments and Projects. New York: Wiley, 1996.
MLA-viite (9. p.)Levine, Shar, ja Leslie Johnstone. Science Around the World: Travel Through Time and Space with Fun Experiments and Projects. Wiley, 1996.
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