Society for the Psychological Study of Social Issues & Selltiz, C. (1976). Research methods in social relations (3rd ed.). National Book Store.
Lua i Stíl Chicago (17ú heag.)Society for the Psychological Study of Social Issues agus Claire Selltiz. Research Methods in Social Relations. 3rd ed. Manila: National Book Store, 1976.
Lua MLA (9ú heag.)Society for the Psychological Study of Social Issues agus Claire Selltiz. Research Methods in Social Relations. 3rd ed. National Book Store, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.