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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)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.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.