Cohen, Louis, 1928- Research methods in education / Louis Cohen, Lawrence Manion, and Keith Morrison ; with contributions from Richard Bell ... [et al.]. - 7th ed. - London ; New York : Routledge, 2011. - xxii, 758 p. : ill. (chiefly col.) ; 25 cm. Includes bibliographical references and index. ISBN: 9780415583350 (hard cover) 9780415583367 (soft cover) LCCN: 2010032342 Subjects--Topical Terms: Education--Research--Great Britain. LC Class. No.: LB1028 / .C572 2011 Dewey Class. No.: 370.72 COH