Krista D. Bridgmon, W. E. M. Quantitative and Statistical Research Methods: From Hypothesis to Results (2012).
Lua i Stíl Chicago (17ú heag.)Krista D. Bridgmon, William Eugene Martin. Quantitative and Statistical Research Methods: From Hypothesis to Results (2012).
Lua MLA (8ú heag.)Krista D. Bridgmon, William Eugene Martin. Quantitative and Statistical Research Methods: From Hypothesis to Results (2012).
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.