Kalvoda R. Robert. (1965). Techniques of Oscillographic Polarography (2-nd ed.). Prague, Publishers of Technical Literature, 1965.
Lua i Stíl Chicago (17ú heag.)Kalvoda R. Robert. Techniques of Oscillographic Polarography. 2-nd ed. Prague, Publishers of Technical Literature, 1965, 1965.
Lua MLA (9ú heag.)Kalvoda R. Robert. Techniques of Oscillographic Polarography. 2-nd ed. Prague, Publishers of Technical Literature, 1965, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.