Bent, R. K., & Kronenberg, H. (1961). Principles and practices of secondary education (4th ed.). McGraw-Hill.
Cita Chicago (17th ed.)Bent, Rudyard Kipling, i Henry Kronenberg. Principles and Practices of Secondary Education. 4th ed. New York: McGraw-Hill, 1961.
Cita MLA (9th ed.)Bent, Rudyard Kipling, i Henry Kronenberg. Principles and Practices of Secondary Education. 4th ed. McGraw-Hill, 1961.
Atenció: Aquestes cites poden no estar 100% correctes.