Goode William J.; Hatt P.K. Methods In Social Research. Mcgrow Hill books Publication.
Lua i Stíl Chicago (17ú heag.)Goode William J.; Hatt P.K. Methods In Social Research. Tokyo: Mcgrow Hill books Publication.
Lua MLA (9ú heag.)Goode William J.; Hatt P.K. Methods In Social Research. Mcgrow Hill books Publication.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.