Frazer, F. (1981). Discovering energy. Stonehenge.
Lua i Stíl Chicago (17ú heag.)Frazer, Frank. Discovering Energy. Stonehenge, 1981.
Lua MLA (9ú heag.)Frazer, Frank. Discovering Energy. Stonehenge, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.