Vega, Violeta A., Facilitating Learning / Violeta A. Vega, Nelia G. Prieto, - Mandaluyong : Books atpb. publishing corp., 2012. - xii, 193 pages : figures ; 14 cm. + Includes bibliographical references. English ISBN: 9710412273 Dewey Class. No.: 371.102 / V422f