Fong, N. S. (2001). Mathematics in action. Longman.
Lua i Stíl Chicago (17ú heag.)Fong, Ng Swee. Mathematics in Action. Singapore: Longman, 2001.
Lua MLA (8ú heag.)Fong, Ng Swee. Mathematics in Action. Longman, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.