Henson, K. T., & Janke, D. (1984). Elementary science methods. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Henson, Kenneth T., agus Delmar Janke. Elementary Science Methods. New York: McGraw-Hill, 1984.
Lua MLA (9ú heag.)Henson, Kenneth T., agus Delmar Janke. Elementary Science Methods. McGraw-Hill, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.