Tohutoro APA (7th ed.)

Purcell, J. H., & Leppien, J. H. (2010). Parallel curriculum units for social studies, grades 6-12. Corwin, a SAGE Company.

Tohutoru Kātū Chicago (17th ed.)

Purcell, Jeanne H., me Jann H. Leppien. Parallel Curriculum Units for Social Studies, Grades 6-12. Thousand Oaks, California: Corwin, a SAGE Company, 2010.

Tohutoro MLA (9th ed.)

Purcell, Jeanne H., me Jann H. Leppien. Parallel Curriculum Units for Social Studies, Grades 6-12. Corwin, a SAGE Company, 2010.