Lapeña, B. A. (1988). Mathematics achievement of grade six pupils in the public elementary schools of Bacnotan district: An appraisal.
Cita Chicago (17th ed.)Lapeña, Bona Ami. Mathematics Achievement of Grade Six Pupils in the Public Elementary Schools of Bacnotan District: An Appraisal. 1988.
Cita MLA (9th ed.)Lapeña, Bona Ami. Mathematics Achievement of Grade Six Pupils in the Public Elementary Schools of Bacnotan District: An Appraisal. 1988.
Atenció: Aquestes cites poden no estar 100% correctes.