APA
Richardson J. S. ., Cahoon G. ., . (1951). Methods and materials for teaching general and physical science. New York: McGraw Hill Book Company.
Chicago
Richardson John S, Cahoon G.P, . 1951. Methods and materials for teaching general and physical science. New York: McGraw Hill Book Company.
Harvard
Richardson J. S. ., Cahoon G. ., . (1951). Methods and materials for teaching general and physical science. New York: McGraw Hill Book Company.
MLA
Richardson John S, Cahoon G.P, . Methods and materials for teaching general and physical science. New York: McGraw Hill Book Company. 1951.