Schuman, H., & Fresser, S. (1981). Questions and answers in attitude surveys: Experiments on question form, wording, and contetext. Academic Press.
Lua i Stíl Chicago (17ú heag.)Schuman, Howard, agus Stanlley Fresser. Questions and Answers in Attitude Surveys: Experiments on Question Form, Wording, and Contetext. Academic Press, 1981.
Lua MLA (8ú heag.)Schuman, Howard, agus Stanlley Fresser. Questions and Answers in Attitude Surveys: Experiments on Question Form, Wording, and Contetext. Academic Press, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.