Betts, Emmett Albert. Education. The Bobbs-Merrill Company.
Cita Chicago Style (17a ed.)Betts, Emmett Albert. Education. Indianapolis: The Bobbs-Merrill Company.
Cita MLA (9a ed.)Betts, Emmett Albert. Education. The Bobbs-Merrill Company.
Precaución: Estas citas no son 100% exactas.