Linebarger, Deborah L. (November 2011). "Teaching with television: New evidence supports an old medium". The Phi Delta Kappan. 93 (3). Phi Delta Kappa International: 63. doi:10.1177/003172171109300315. S2CID140369989.
Linebarger, Deborah L. (November 2011). "Teaching with television: New evidence supports an old medium". The Phi Delta Kappan. 93 (3). Phi Delta Kappa International: 63. doi:10.1177/003172171109300315. S2CID140369989.