PARKER, A. (2005). MENTAL MATHS STRATEGIES BOOK- 2. SHETH PUBLISHING HOUSE.
Lua i Stíl Chicago (17ú heag.)PARKER, ALAN. MENTAL MATHS STRATEGIES BOOK- 2. SHETH PUBLISHING HOUSE, 2005.
Lua MLA (9ú heag.)PARKER, ALAN. MENTAL MATHS STRATEGIES BOOK- 2. SHETH PUBLISHING HOUSE, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.