Erickson, B. H., & Nosanchuk, T. A. (1992). Understanding data (2nd ed.). Open University Press.
Lua i Stíl Chicago (17ú heag.)Erickson, Bonnie H., agus T. A. Nosanchuk. Understanding Data. 2nd ed. Buckingham: Open University Press, 1992.
Lua MLA (9ú heag.)Erickson, Bonnie H., agus T. A. Nosanchuk. Understanding Data. 2nd ed. Open University Press, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.