Lua APA (7ú heag.)

(1983). Philips language learning system: English IV [kaset]. Zurich : Philips AG.

Lua i Stíl Chicago (17ú heag.)

Philips Language Learning System: English IV [kaset]. Zurich : Philips AG, 1983.

Lua MLA (9ú heag.)

Philips Language Learning System: English IV [kaset]. Zurich : Philips AG, 1983.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.