APA
Laton Anita Duncan, Powers Samuel Ralph, . (1949). New directions in science teaching: A report of a cooperative project in seventeen secondary schools with the Bureau of Educational Research in Science Teachers College, Columbia University. New York, USA: McGraw Hill Book Company Inc.
Chicago
Laton Anita Duncan, Powers Samuel Ralph, . 1949. New directions in science teaching: A report of a cooperative project in seventeen secondary schools with the Bureau of Educational Research in Science Teachers College, Columbia University. New York, USA: McGraw Hill Book Company Inc.
Harvard
Laton Anita Duncan, Powers Samuel Ralph, . (1949). New directions in science teaching: A report of a cooperative project in seventeen secondary schools with the Bureau of Educational Research in Science Teachers College, Columbia University. New York, USA: McGraw Hill Book Company Inc.
MLA
Laton Anita Duncan, Powers Samuel Ralph, . New directions in science teaching: A report of a cooperative project in seventeen secondary schools with the Bureau of Educational Research in Science Teachers College, Columbia University. New York, USA: McGraw Hill Book Company Inc. 1949.