Não informado. (1966). Programmed learning and educational technology. Association for Programmed Learning.
Citação do estilo Chicago (17ª ed.)Não informado. Programmed Learning and Educational Technology. London: Association for Programmed Learning, 1966.
Citação MLA (8ª ed.)Não informado. Programmed Learning and Educational Technology. Association for Programmed Learning, 1966.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.