Cita APA (7a ed.)

Association for Programmed Learning and Educational Technology. Conference (6a, Packham, D., Cleary, A., & Mayes, T. (1971). Aspects of educational technology. Pitman.

Cita Chicago Style (17a ed.)

Association for Programmed Learning and Educational Technology. Conference (6a, Derek Packham, Alan Cleary, y Terry Mayes. Aspects of Educational Technology. London [etc.]: Pitman, 1971.

Cita MLA (9a ed.)

Association for Programmed Learning and Educational Technology. Conference (6a, et al. Aspects of Educational Technology. Pitman, 1971.