Math games for middle school
Salvadori Mario George, Wright Joseph P.Kniha
Citace v seznamu literatury:
SALVADORI, Mario George a WRIGHT, Joseph P. Math games for middle school: challenges and skill-builders for students at every level. Chicago: Chicago Review Press, [1998]. ISBN 1556522886. Dostupné také z: http://www.loc.gov/catdir/enhancements/fy0668/97051422-d.html.