Cristobal, Amadeo P. Practical research 1 for SHS / Amadeo P. Cristobal - Quezon City, PH : C&E Publishing Inc., 2017. - vii, 286 pages : 26 cm. ISBN: 9789719806127 Subjects--Topical Terms: Research. Dewey Class. No.: 001.4 / C933 2017