Johnson, W. H. E. (. H. E. (1969). Russia's educational heritage. New York: Octagon Books.
Dyfyniad Arddull ChicagoJohnson, William H. E. (William Herman Eckart). Russia's Educational Heritage. New York: Octagon Books, 1969.
Dyfyniad MLAJohnson, William H. E. (William Herman Eckart). Russia's Educational Heritage. New York: Octagon Books, 1969.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.