WALKER, H. M. (1951). Mathematics essential for elementary: Statistics; a self-teaching manual. Holt, Rinehart and Winston.
Chicago-Zitierstil (17. Ausg.)WALKER, Helen M. Mathematics Essential for Elementary: Statistics; a Self-teaching Manual. New York: Holt, Rinehart and Winston, 1951.
MLA-Zitierstil (9. Ausg.)WALKER, Helen M. Mathematics Essential for Elementary: Statistics; a Self-teaching Manual. Holt, Rinehart and Winston, 1951.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.