George Taylor; Brendan Flynn. The Irish Greens. E. Gene Frankland; Paul Lucardie; Benoît Rihoux (编). Green Parties in Transition: The End of Grass-roots Democracy?. Ashgate Publishing, Ltd. 2008: 97 [22 October 2016]. ISBN 978-0-7546-7429-0. (原始内容存档于26 December 2018).
John Barlow; David Farnham; Sylvia Horton; F.F. Ridley. Comparing Public Managers. David Farnham; Annie Hondeghem; Sylvia Horton; John Barlow (编). New Public Managers in Europe: Public Servants in Transition. Springer. 2016: 19 [22 October 2016]. ISBN 978-1-349-13947-7. (原始内容存档于26 December 2018).
George Taylor; Brendan Flynn. The Irish Greens. E. Gene Frankland; Paul Lucardie; Benoît Rihoux (编). Green Parties in Transition: The End of Grass-roots Democracy?. Ashgate Publishing, Ltd. 2008: 97 [22 October 2016]. ISBN 978-0-7546-7429-0. (原始内容存档于26 December 2018).
John Barlow; David Farnham; Sylvia Horton; F.F. Ridley. Comparing Public Managers. David Farnham; Annie Hondeghem; Sylvia Horton; John Barlow (编). New Public Managers in Europe: Public Servants in Transition. Springer. 2016: 19 [22 October 2016]. ISBN 978-1-349-13947-7. (原始内容存档于26 December 2018).