Allen, M. G., & Stevens, R. L. (1998). Middle grades social studies: Teaching and learning for active and responsible citizenship (2a. ed.). Allyn and Bacon.

Allen, Michael G., and Robert L. Stevens. Middle Grades Social Studies: Teaching and Learning for Active and Responsible Citizenship. 2a. ed. Boston: Allyn and Bacon, 1998.

Allen, Michael G., and Robert L. Stevens. Middle Grades Social Studies: Teaching and Learning for Active and Responsible Citizenship. 2a. ed. Allyn and Bacon, 1998.