APA

Richardson J. S., Cahoon G. P., . (1951). Methods and materials for teaching general and physical science. New York: McGraw-Hill.

Chicago

Richardson John Sanford, Cahoon Guybert Phillips, . 1951. Methods and materials for teaching general and physical science. New York: McGraw-Hill.

Harvard

Richardson J. S., Cahoon G. P., . (1951). Methods and materials for teaching general and physical science. New York: McGraw-Hill.

MLA

Richardson John Sanford, Cahoon Guybert Phillips, . Methods and materials for teaching general and physical science. New York: McGraw-Hill. 1951.