Rockcastle, V. N., Salomon, F. R., & Schmidt, V. E. (1975). Elementary school science, level 1. Addison-Wesley.
Lua i Stíl Chicago (17ú heag.)Rockcastle, Verne N., Frank R. Salomon, agus Victor E. Schmidt. Elementary School Science, Level 1. Menlo Park, CA: Addison-Wesley, 1975.
Lua MLA (9ú heag.)Rockcastle, Verne N., et al. Elementary School Science, Level 1. Addison-Wesley, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.