Soro, L. S. (2003). Basic mathematics with recreational mathematics. Sta. Monica Print.
Lua i Stíl Chicago (17ú heag.)Soro, Lourdes S. Basic Mathematics with Recreational Mathematics. Manila: Sta. Monica Print, 2003.
Lua MLA (9ú heag.)Soro, Lourdes S. Basic Mathematics with Recreational Mathematics. Sta. Monica Print, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.