Cohen, Louis Research Methods in education / Louis Cohen, Lawrence Manion and Keith Morrison - 5th ed. - London : RoutledgeFalmer, 2000 - xvi, 446 p. : charts ; tables 24 cm. Includes index Bibliography: p. 407-437 ISBN: 0415195411 Subjects--Topical Terms: Research Dewey Class. No.: 370.72 COH