Farris, P. J. (2001). Elementary & middle school social studies: An interdisciplinary instructional approach (3rd ed.). Boston: McGraw-Hill.
Dyfyniad Arddull ChicagoFarris, Pamela J. Elementary & Middle School Social Studies: An Interdisciplinary Instructional Approach. 3rd ed. Boston: McGraw-Hill, 2001.
Dyfyniad MLAFarris, Pamela J. Elementary & Middle School Social Studies: An Interdisciplinary Instructional Approach. 3rd ed. Boston: McGraw-Hill, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.