APA (7th ed.) Citation

Ortigas, T. Z. High school mathematics. [s.n.].

Chicago Style (17th ed.) Citation

Ortigas, Teresa Z. High School Mathematics. [s.l. ]: [s.n.].

MLA (9th ed.) Citation

Ortigas, Teresa Z. High School Mathematics. [s.n.].

Warning: These citations may not always be 100% accurate.