Gray, D. E. (2013). Doing research in the real world (3rd edition.). Sage Publications.
Lua i Stíl Chicago (17ú heag.)Gray, David E. Doing Research in the Real World. 3rd edition. Thousand Oaks, CA: Sage Publications, 2013.
Lua MLA (8ú heag.)Gray, David E. Doing Research in the Real World. 3rd edition. Sage Publications, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.