Lowell, L. (1997). Sifting through science: Teacher's guide. Lawrence Hall of Science, University of California.
Chicago-referens (17:e uppl.)Lowell, Laura. Sifting Through Science: Teacher's Guide. Berkeley, CA: Lawrence Hall of Science, University of California, 1997.
MLA-referens (9:e uppl.)Lowell, Laura. Sifting Through Science: Teacher's Guide. Lawrence Hall of Science, University of California, 1997.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.