Levenson, E. (1994). Teaching children about physical science: Ideas and activities every teacher and parent can use (Rev. ed.). TAB Books.
Lua i Stíl Chicago (17ú heag.)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.
Lua MLA (9ú heag.)Levenson, Elaine. Teaching Children About Physical Science: Ideas and Activities Every Teacher and Parent Can Use. Rev. ed. TAB Books, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.