Ric Pimentel; Terry Wall. (2004). Checkpoint Maths Book 2 (Modular Maths for Edexcel) (Bk. 2). "Trans-Atlantic Publications, Inc.".
Lua i Stíl Chicago (17ú heag.)Ric Pimentel; Terry Wall. Checkpoint Maths Book 2 (Modular Maths for Edexcel) (Bk. 2). "Trans-Atlantic Publications, Inc.", 2004.
Lua MLA (9ú heag.)Ric Pimentel; Terry Wall. Checkpoint Maths Book 2 (Modular Maths for Edexcel) (Bk. 2). "Trans-Atlantic Publications, Inc.", 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.