Lansing, J. B., Ginsburg, G. P., & Braaten, K. (1961). An investigation of response error. Bureau of Economic and Business Research, University of Illinois.
Lua i Stíl Chicago (17ú heag.)Lansing, John B., Gerald P. Ginsburg, agus Kaisa Braaten. An Investigation of Response Error. Urbana: Bureau of Economic and Business Research, University of Illinois, 1961.
Lua MLA (9ú heag.)Lansing, John B., et al. An Investigation of Response Error. Bureau of Economic and Business Research, University of Illinois, 1961.
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