Fiona Baxter; Liz Dilley; Alan Cross; Jon Board. (2014). Cambridge Primary Science Stage 4 Learner's Book. CAMBRIDGE UNIVERSITY PRESS.
Lua i Stíl Chicago (17ú heag.)Fiona Baxter; Liz Dilley; Alan Cross; Jon Board. Cambridge Primary Science Stage 4 Learner's Book. CAMBRIDGE UNIVERSITY PRESS, 2014.
Lua MLA (9ú heag.)Fiona Baxter; Liz Dilley; Alan Cross; Jon Board. Cambridge Primary Science Stage 4 Learner's Book. CAMBRIDGE UNIVERSITY PRESS, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.