Lowell, L. (1997). Sifting through science: Teacher's guide. Lawrence Hall of Science, University of California.
Lua i Stíl Chicago (17ú heag.)Lowell, Laura. Sifting Through Science: Teacher's Guide. Berkeley, CA: Lawrence Hall of Science, University of California, 1997.
Lua MLA (9ú heag.)Lowell, Laura. Sifting Through Science: Teacher's Guide. Lawrence Hall of Science, University of California, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.