Essentials of research methodology / Amante,Diosdado A.; Atienza, Leticia P. ; Mendoza, Catalino N. - Mandaluyong City : Cacho Hermanos, Inc., 2008. - 122p.; 26.4cm includes appendices, references ISBN: 9789710445431 Dewey Class. No.: Fil 001.4 Am484 2008