Alves, J. de J.F. O cooperativismo e os ... 1980 (subj.) p. 10 (Probos Pioneiros de Rochdale) p. 19 (Sociedade dos Probos Pioneiros de Rochdale)
The meaning of Rochdale, c1994 t.p. (Rochdale Pioneers) p. 1, etc. (Rochdale Society of Equitable Pioneers; co-operative society est. 1844 in Rochdale, England)