OPEN UNIVERSITY. (1980). MODELS AND DECISION MAKER. OPEN UNIVERSITY PRESS.
Lua i Stíl Chicago (17ú heag.)OPEN UNIVERSITY. MODELS AND DECISION MAKER. MILTON KEYNES: OPEN UNIVERSITY PRESS, 1980.
Lua MLA (9ú heag.)OPEN UNIVERSITY. MODELS AND DECISION MAKER. OPEN UNIVERSITY PRESS, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.