APA

San Jose N. E. C., Mary Margarette R. Montalla, . (2019). Determining the pH level of water in different water stations in Barangay Concepcion Uno, Marikina City in correspondence to the environment protection agency standards with the use of litmus paper. Marikina City: .

Chicago

San Jose Nina Elaine C, Mary Margarette R. Montalla, . 2019. Determining the pH level of water in different water stations in Barangay Concepcion Uno, Marikina City in correspondence to the environment protection agency standards with the use of litmus paper. Marikina City: .

Harvard

San Jose N. E. C., Mary Margarette R. Montalla, . (2019). Determining the pH level of water in different water stations in Barangay Concepcion Uno, Marikina City in correspondence to the environment protection agency standards with the use of litmus paper. Marikina City: .

MLA

San Jose Nina Elaine C, Mary Margarette R. Montalla, . Determining the pH level of water in different water stations in Barangay Concepcion Uno, Marikina City in correspondence to the environment protection agency standards with the use of litmus paper. Marikina City: . 2019.