APA (7th ed.) Citation

Martorella, P. H. (1976). Elementary social studies as a learning system. Harper & Row.

Chicago Style (17th ed.) Citation

Martorella, Peter H. Elementary Social Studies as a Learning System. New York [u.a.]: Harper & Row, 1976.

MLA (9th ed.) Citation

Martorella, Peter H. Elementary Social Studies as a Learning System. Harper & Row, 1976.