Eisermann, G. (1973). Sociologia. FCG.
Lua i Stíl Chicago (17ú heag.)Eisermann, Gottfried. Sociologia. FCG, 1973.
Lua MLA (8ú heag.)Eisermann, Gottfried. Sociologia. FCG, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.