Levenson, E. (1994). Teaching children about physical science: Ideas and activities every teacher and parent can use (Rev. ed.). TAB Books.
Chicago-referens (17:e uppl.)Levenson, Elaine. Teaching Children About Physical Science: Ideas and Activities Every Teacher and Parent Can Use. Rev. ed. Blue Ridge Summit, PA: TAB Books, 1994.
MLA-referens (9:e uppl.)Levenson, Elaine. Teaching Children About Physical Science: Ideas and Activities Every Teacher and Parent Can Use. Rev. ed. TAB Books, 1994.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.