Dyfyniad APA
Spring, J. H. (2006). American education (12th ed.). McGraw-Hill.
Dyfyniad Arddull Chicago
Spring, Joel H. American Education. 12th ed. Boston, Mass.: McGraw-Hill, 2006.
Dyfyniad MLA
Spring, Joel H. American Education. 12th ed. McGraw-Hill, 2006.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.