Science and Mathematics Education Manpower Development Project (SMEMDP). (2000). Sourcebook on practical work for teacher trainers: Elementary school science, vol.2. SMEMDP.
Cita Chicago (17th ed.)Science and Mathematics Education Manpower Development Project (SMEMDP). Sourcebook on Practical Work for Teacher Trainers: Elementary School Science, Vol.2. Diliman, Quezon City: SMEMDP, 2000.
Cita MLA (9th ed.)Science and Mathematics Education Manpower Development Project (SMEMDP). Sourcebook on Practical Work for Teacher Trainers: Elementary School Science, Vol.2. SMEMDP, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.