Haga, Y. (1972). Political aspect of social democracy. Solidaridad Publishing House.
Lua i Stíl Chicago (17ú heag.)Haga, Yasushi. Political Aspect of Social Democracy. Manila: Solidaridad Publishing House, 1972.
Lua MLA (9ú heag.)Haga, Yasushi. Political Aspect of Social Democracy. Solidaridad Publishing House, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.