Fowler, F. J., & Mangione, T. W. (1990). Standardized survey interviewing: Minimizing interviewer-related error. Sage Publications.
Lua i Stíl Chicago (17ú heag.)Fowler, Floyd J., agus Thomas W. Mangione. Standardized Survey Interviewing: Minimizing Interviewer-related Error. Newbury Park, Calif: Sage Publications, 1990.
Lua MLA (9ú heag.)Fowler, Floyd J., agus Thomas W. Mangione. Standardized Survey Interviewing: Minimizing Interviewer-related Error. Sage Publications, 1990.
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