Association for Programmed Learning and Educational Technology, Association for Educational and Training Technology, Association for Programmed Learning and Educational Technology. Annual Conference, & Educational Technology International Conference. (1969). Aspects of educational technology. Pitman.
Чикаго стиль цитування (17-те видання)Association for Programmed Learning and Educational Technology, Association for Educational and Training Technology, Association for Programmed Learning and Educational Technology. Annual Conference, та Educational Technology International Conference. Aspects of Educational Technology. London ; New York: Pitman, 1969.
Стиль цитування MLA (8-ме видання)Association for Programmed Learning and Educational Technology, et al. Aspects of Educational Technology. Pitman, 1969.