Spring, J. H. (2012). American education (Fifteenth edition.). McGraw-Hill.
Cita Chicago (17th ed.)Spring, Joel H. American Education. Fifteenth edition. New York: McGraw-Hill, 2012.
Cita MLA (9th ed.)Spring, Joel H. American Education. Fifteenth edition. McGraw-Hill, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.