National Education Association of the United States. Division of Audio-Visual Instructional Service, Frazier, A., & Wigren, H. (1960). Opportunities for learning : guidelines for television: A report of a seminar held at NEA headquarters, May 16-18, 1959. s.n.
Citace podle Chicago (17th ed.)National Education Association of the United States. Division of Audio-Visual Instructional Service, Alexander Frazier, a Harold Wigren. Opportunities for Learning : Guidelines for Television: A Report of a Seminar Held at NEA Headquarters, May 16-18, 1959. Washington: s.n, 1960.
Citace podle MLA (9th ed.)National Education Association of the United States. Division of Audio-Visual Instructional Service, et al. Opportunities for Learning : Guidelines for Television: A Report of a Seminar Held at NEA Headquarters, May 16-18, 1959. s.n, 1960.