Lawrence Hall of Science, GEMS (Project), & Barber, J. (1997). GEMS leader's handbook. Great Explorations in Math and Science (GEMS), Lawrence Hall of Science, University of California.
Citace podle Chicago (17th ed.)Lawrence Hall of Science, GEMS (Project), a Jacqueline Barber. GEMS Leader's Handbook. Berkeley, CA: Great Explorations in Math and Science (GEMS), Lawrence Hall of Science, University of California, 1997.
Citace podle MLA (9th ed.)Lawrence Hall of Science, et al. GEMS Leader's Handbook. Great Explorations in Math and Science (GEMS), Lawrence Hall of Science, University of California, 1997.
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