Sabado, F. P. Paradoxes as learning activities for High School Mathematics.
芝加哥风格引文Sabado, Federico P. Paradoxes as Learning Activities for High School Mathematics. Quezon City, 1979.
MLA引文Sabado, Federico P. Paradoxes as Learning Activities for High School Mathematics.
警告：这些引文格式不一定是100％准确.