Παραπομπή σε μορφή APA (7η εκδ.)

Sabado, F. P. Paradoxes as learning activities for High School Mathematics.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Sabado, Federico P. Paradoxes as Learning Activities for High School Mathematics. Quezon City, 1979.

Παραπομπή σε μορφή MLA (9th εκδ.)

Sabado, Federico P. Paradoxes as Learning Activities for High School Mathematics.