Bottomley, T. (1979). An introduction to co-operatives: A programmed learning text. Intermediate Technology Publications [for the] Co-operative Educational Materials Advisory Service of the International Co-operative Alliance.

Bottomley, Trevor. An Introduction to Co-operatives: A Programmed Learning Text. London: Intermediate Technology Publications [for the] Co-operative Educational Materials Advisory Service of the International Co-operative Alliance, 1979.

Bottomley, Trevor. An Introduction to Co-operatives: A Programmed Learning Text. Intermediate Technology Publications [for the] Co-operative Educational Materials Advisory Service of the International Co-operative Alliance, 1979.