The Mathematical Association of Western Australia & Title : One hundred mathematical problems for students aged 11 to 13 years. 100 mathematical problems for students aged 11 to 13 years. Mathematical Association of Western Australia, c1980.
Chicago-referens (17:e uppl.)The Mathematical Association of Western Australia och Title : One hundred mathematical problems for students aged 11 to 13 years. 100 Mathematical Problems for Students Aged 11 to 13 Years. [s.l.]: Mathematical Association of Western Australia, c1980.
MLA-referens (9:e uppl.)The Mathematical Association of Western Australia och Title : One hundred mathematical problems for students aged 11 to 13 years. 100 Mathematical Problems for Students Aged 11 to 13 Years. Mathematical Association of Western Australia, c1980.