Sabado, F. P. Paradoxes as learning activities for High School Mathematics.
Lua i Stíl Chicago (17ú heag.)Sabado, Federico P. Paradoxes as Learning Activities for High School Mathematics. Quezon City, 1979.
Lua MLA (9ú heag.)Sabado, Federico P. Paradoxes as Learning Activities for High School Mathematics.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.