Sudman, S. (1976). Applied sampling. Academic Press.
Lua i Stíl Chicago (17ú heag.)Sudman, Seymour. Applied Sampling. New York: Academic Press, 1976.
Lua MLA (8ú heag.)Sudman, Seymour. Applied Sampling. Academic Press, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.