Briggs, A., & Pollard, S. (1959). Robert Owen in Retrospect. A Co-operative Pioneer. Loughborough: Coperative Union.
Cita Chicago (17th ed.)Briggs, A., i Sidney Pollard. Robert Owen in Retrospect. A Co-operative Pioneer. Loughborough: Coperative Union, 1959.
Cita MLA (8th ed.)Briggs, A., i Sidney Pollard. Robert Owen in Retrospect. A Co-operative Pioneer. Loughborough: Coperative Union, 1959.
Atenció: Aquestes cites poden no estar 100% correctes.