Holley, P., & Ostler, N. K. (1997). Sampling and analysis. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Holley, Patrick, agus Neal K. Ostler. Sampling and Analysis. Upper Saddle River, N.J: Prentice Hall, 1997.
Lua MLA (9ú heag.)Holley, Patrick, agus Neal K. Ostler. Sampling and Analysis. Prentice Hall, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.