Cohen, Louis Research methods in education - 8 ed. - N.Y., USA Routledge, Taylor & Francis Group 2018 - 916 p. 23.5 cm. il. ISBN: 9781138209886 Subjects--Topical Terms: EDUCACIÓN MÉTODOS DE INVESTIGACIÓN EVALUATION ETHICS EDUCATIONALINTERVIEWS Dewey Class. No.: 370.72 C678r8