Lua APA (7ú heag.)

(2009). PYP L10 The Earth's Resources single (Pearson Baccalaureate PrimaryYears Programme). Heinemann.

Lua i Stíl Chicago (17ú heag.)

PYP L10 The Earth's Resources Single (Pearson Baccalaureate PrimaryYears Programme). Heinemann, 2009.

Lua MLA (9ú heag.)

PYP L10 The Earth's Resources Single (Pearson Baccalaureate PrimaryYears Programme). Heinemann, 2009.

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