National Science Teachers Association & US Dept. of Energy. (1977). Community workers and the energy they use: Grade 2. The Office.
Chicago-Zitierstil (17. Ausg.)National Science Teachers Association und US Dept. of Energy. Community Workers and the Energy They Use: Grade 2. Washington: The Office, 1977.
MLA-Zitierstil (9. Ausg.)National Science Teachers Association und US Dept. of Energy. Community Workers and the Energy They Use: Grade 2. The Office, 1977.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.