BABBIE, E. (1986). The Practice Of Social Research. Wadsworth Publishing Co.
Lua i Stíl Chicago (17ú heag.)BABBIE, Earl. The Practice Of Social Research. Wadsworth Publishing Co, 1986.
Lua MLA (8ú heag.)BABBIE, Earl. The Practice Of Social Research. Wadsworth Publishing Co, 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.