Hartley, H. O., & David, H. A. (1978). Contributions to survey sampling and applied statistics: Papers in honor of H. O. Hartley. Academic Press.
Lua i Stíl Chicago (17ú heag.)Hartley, H. O., agus H. A. David. Contributions to Survey Sampling and Applied Statistics: Papers in Honor of H. O. Hartley. New York: Academic Press, 1978.
Lua MLA (8ú heag.)Hartley, H. O., agus H. A. David. Contributions to Survey Sampling and Applied Statistics: Papers in Honor of H. O. Hartley. Academic Press, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.