University of the Philippines Institute of Chemistry Water Research and Management Laboratory & University of the Philippines Institute of Chemistry Water Research and Management Laboratory. (2019). Manual of procedures for sampling, sample preparation and analysis of heavy metals in Laguna Lake water. University of the Philippines Diliman.

University of the Philippines Institute of Chemistry Water Research and Management Laboratory and University of the Philippines Institute of Chemistry Water Research and Management Laboratory. Manual of Procedures for Sampling, Sample Preparation and Analysis of Heavy Metals in Laguna Lake Water. Quezon City, Philippines: University of the Philippines Diliman, 2019.

University of the Philippines Institute of Chemistry Water Research and Management Laboratory and University of the Philippines Institute of Chemistry Water Research and Management Laboratory. Manual of Procedures for Sampling, Sample Preparation and Analysis of Heavy Metals in Laguna Lake Water. University of the Philippines Diliman, 2019.