Sanchez, Custodiosa A. Methods and techniques of research / Custodiosa A. Sanchez - 3rd ed. - Manila : Rex Book Store, c1997. - xi , 263 p. ; 22 cm. Includes references and index. ISBN: 971-23-2301-3 Subjects--Topical Terms: 1. Research - Method. Dewey Class. No.: Res. 001.42 Sa55m 1997