Posadas, J. (1977). The Meeting of the Socialist International: The Congress of the Spanish P.S.O.E. and the World Process of the Revolution. Revolutionary Party Workers (Trotskyist).
Lua i Stíl Chicago (17ú heag.)Posadas, J. The Meeting of the Socialist International: The Congress of the Spanish P.S.O.E. and the World Process of the Revolution. London: Revolutionary Party Workers (Trotskyist), 1977.
Lua MLA (8ú heag.)Posadas, J. The Meeting of the Socialist International: The Congress of the Spanish P.S.O.E. and the World Process of the Revolution. Revolutionary Party Workers (Trotskyist), 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.