Freund, J. E. (1971). Mathematical statistics (2d ed.). Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Freund, John E. Mathematical Statistics. 2d ed. Englewood Cliffs, N.J: Prentice-Hall, 1971.
Lua MLA (9ú heag.)Freund, John E. Mathematical Statistics. 2d ed. Prentice-Hall, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.