Não informado. (1991). Research Evaluation. Beech Tree Publishing.
Lua i Stíl Chicago (17ú heag.)Não informado. Research Evaluation. Guildford, Inglaterra: Beech Tree Publishing, 1991.
Lua MLA (8ú heag.)Não informado. Research Evaluation. Beech Tree Publishing, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.