University of the Philippines Diliman. National Institute for Science and Mathematics Education Development High School Mathematics Group Writing Team. (2001). Sourcebook on practical work for teacher trainers: High school mathematics III & IV. SMEMDP.
Cita Chicago (17th ed.)University of the Philippines Diliman. National Institute for Science and Mathematics Education Development High School Mathematics Group Writing Team. Sourcebook on Practical Work for Teacher Trainers: High School Mathematics III & IV. Diliman, Quezon City: SMEMDP, 2001.
Cita MLA (9th ed.)University of the Philippines Diliman. National Institute for Science and Mathematics Education Development High School Mathematics Group Writing Team. Sourcebook on Practical Work for Teacher Trainers: High School Mathematics III & IV. SMEMDP, 2001.