Kessler, C. (1993). International Scientific Cooperation, Consolidated report of activities, 1987 - 90.
Lua i Stíl Chicago (17ú heag.)Kessler, C. International Scientific Cooperation, Consolidated Report of Activities, 1987 - 90. 1993.
Lua MLA (9ú heag.)Kessler, C. International Scientific Cooperation, Consolidated Report of Activities, 1987 - 90. 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.