Gatchalian, R. C. (1983). Verbal mathematics problems formulated by CLSU freshmen students from different socio-economic levels.
Lua i Stíl Chicago (17ú heag.)Gatchalian, Rodrigo Cardines. Verbal Mathematics Problems Formulated by CLSU Freshmen Students from Different Socio-economic Levels. 1983.
Lua MLA (9ú heag.)Gatchalian, Rodrigo Cardines. Verbal Mathematics Problems Formulated by CLSU Freshmen Students from Different Socio-economic Levels. 1983.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.