1. Allen, M. J., & Thompson, B. (2005). Cases and materials on constitutional and administrative law (8th ed.). Oxford: Oxford University Press.
2. Alley, R. (2003). Ethnosecession in Papua New Guinea: The Bougainville case. In R. Ganguly & I. Macduff (Eds.), Ethnic conflict and secessionism in South and South East Asia: Causes dynamics and solutions (pp. 225–256). New Delhi: Sage Publications.
3. Amiel, H. (1976). La pratique française des plébiscites internationaux. Revue générale de droit international public, 425–501.
4. Anckar, D. (2004). Finland. In B. Kaufmann & M. Dane Waters (Eds.), Direct democracy in Europe: A comprehensive guide to the initiative and referendum process in Europe (pp. 59–61). Durham, NC: Carolina Academic Press.
5. Ardant, P. (2005). Institutions politiques & droit constitutionnel (17th ed.). Paris: L.G.D.J.