APA (7th ed.) Citation

De La Pena,Carmen R. (1981). Mathematics I: Basic mathematics for secondary schools. Phoenix Publishing House Inc.

Chicago Style (17th ed.) Citation

De La Pena,Carmen R. Mathematics I: Basic Mathematics for Secondary Schools. Quezon City: Phoenix Publishing House Inc, 1981.

MLA (9th ed.) Citation

De La Pena,Carmen R. Mathematics I: Basic Mathematics for Secondary Schools. Phoenix Publishing House Inc, 1981.

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