Douglas, J. R. (1972). Free-Schooling; Alternative Education and Its Documentation.
Cita Chicago Style (17a ed.)Douglas, John R. Free-Schooling; Alternative Education and Its Documentation. 1972.
Cita MLA (9a ed.)Douglas, John R. Free-Schooling; Alternative Education and Its Documentation. 1972.
Precaución: Estas citas no son 100% exactas.