Blum, V. C. (1963). Freedom of choice in education (Rev. ed.). Paulist Press.
Dyfyniad Arddull ChicagoBlum, Virgil C. Freedom of Choice in Education. Rev. ed. Glen Rock, N.J.: Paulist Press, 1963.
Dyfyniad MLABlum, Virgil C. Freedom of Choice in Education. Rev. ed. Paulist Press, 1963.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.