SpringerLink (Online service) & Qvortrup, M. (2018). Referendums Around the World: With a Foreword by Sir David Butler (1st ed. 2018.). Springer International Publishing : Imprint: Palgrave Macmillan. https://doi.org/10.1007/978-3-319-57798-2
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service) και Matt Qvortrup. Referendums Around the World: With a Foreword by Sir David Butler. 1st ed. 2018. Cham: Springer International Publishing : Imprint: Palgrave Macmillan, 2018. https://doi.org/10.1007/978-3-319-57798-2.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service) και Matt Qvortrup. Referendums Around the World: With a Foreword by Sir David Butler. 1st ed. 2018. Springer International Publishing : Imprint: Palgrave Macmillan, 2018. https://doi.org/10.1007/978-3-319-57798-2.
