Mendenhall, W. (1971). Elementary Survey Sampling William Mendenhall; Lyman Ott And Richard L. Scheaffer. Wadsworth.
Lua i Stíl Chicago (17ú heag.)Mendenhall, William. Elementary Survey Sampling William Mendenhall; Lyman Ott And Richard L. Scheaffer. Wadsworth, 1971.
Lua MLA (8ú heag.)Mendenhall, William. Elementary Survey Sampling William Mendenhall; Lyman Ott And Richard L. Scheaffer. Wadsworth, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.