Sabado, F. P. Paradoxes as learning activities for High School Mathematics.
Citazione stile Chigago Style (17a edizione)Sabado, Federico P. Paradoxes as Learning Activities for High School Mathematics. Quezon City, 1979.
Citatione MLA (9a ed.)Sabado, Federico P. Paradoxes as Learning Activities for High School Mathematics.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.