Ostler, N. K. (1997). Sampling and analysis. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Ostler, Neal K. Sampling and Analysis. New Jersey: Prentice Hall, 1997.
Lua MLA (9ú heag.)Ostler, Neal K. Sampling and Analysis. Prentice Hall, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.