Sonquist, J. A., & Dunkelberg, W. C. (1977). Survey and opinion research: Procedures for processing and analysis. Prentice-Hall.
Chicago-viite (17. p.)Sonquist, John A., ja William C. Dunkelberg. Survey and Opinion Research: Procedures for Processing and Analysis. Englewood Cliffs, N.J.: Prentice-Hall, 1977.
MLA-viite (9. p.)Sonquist, John A., ja William C. Dunkelberg. Survey and Opinion Research: Procedures for Processing and Analysis. Prentice-Hall, 1977.
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