Ragasa, C. Y. (1987). Some factors affecting mathematical problem solving ability in second year high school. s.n.
Chicago-referens (17:e uppl.)Ragasa, Carmelita Yasana. Some Factors Affecting Mathematical Problem Solving Ability in Second Year High School. s.l: s.n, 1987.
MLA-referens (9:e uppl.)Ragasa, Carmelita Yasana. Some Factors Affecting Mathematical Problem Solving Ability in Second Year High School. s.n, 1987.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.