Audesirk, T., Audesirk, G., & Byers, B. E. (2000). Life on earth: Test item file (2nd ed.). Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Audesirk, Teresa, Gerald Audesirk, agus Bruce E. Byers. Life on Earth: Test Item File. 2nd ed. Upper Saddle River, N.J: Prentice Hall, 2000.
Lua MLA (9ú heag.)Audesirk, Teresa, et al. Life on Earth: Test Item File. 2nd ed. Prentice Hall, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.