Mallory, V. S. (1972). The relative difficulty of certain topics in mathematics for slow-moving ninth grade pupils (Reprint of the 1939 ed.). AMS Press.
Chicago-Zitierstil (17. Ausg.)Mallory, Virgil S. The Relative Difficulty of Certain Topics in Mathematics for Slow-moving Ninth Grade Pupils. Reprint of the 1939 ed. New York: AMS Press, 1972.
MLA-Zitierstil (9. Ausg.)Mallory, Virgil S. The Relative Difficulty of Certain Topics in Mathematics for Slow-moving Ninth Grade Pupils. Reprint of the 1939 ed. AMS Press, 1972.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.