Lua APA (7ú heag.)

Sonquist, J. A., & Dunkelberg, W. C. (1977). Survey and opinion research: Procedures for processing and analysis. Prentice-Hall.

Lua i Stíl Chicago (17ú heag.)

Sonquist, John A., agus William C. Dunkelberg. Survey and Opinion Research: Procedures for Processing and Analysis. Englewood Cliffs, N.J.: Prentice-Hall, 1977.

Lua MLA (9ú heag.)

Sonquist, John A., agus William C. Dunkelberg. Survey and Opinion Research: Procedures for Processing and Analysis. Prentice-Hall, 1977.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.