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Lua i Stíl Chicago (17ú heag.)Balta, Petru. Introduction to the Physical Chemistry of the Vitreous State. Bucure_sti, Romƒnia: Editura Academiei Republicii Socialiste Romania, 1976.
Lua MLA (9ú heag.)Balta, Petru. Introduction to the Physical Chemistry of the Vitreous State. Editura Academiei Republicii Socialiste Romania, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.