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Lua i Stíl Chicago (17ú heag.)KERLINGER FRED N. FOUNDATIONS OF BEHAVIORAL RESEARCH. NEW DELHI: SURJEET PUBLICATIONS, 1983.
Lua MLA (9ú heag.)KERLINGER FRED N. FOUNDATIONS OF BEHAVIORAL RESEARCH. SURJEET PUBLICATIONS, 1983.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.