(1970). Mathematics: : creation and study of form. Addison-Wesley Publ. Comp.
Lua i Stíl Chicago (17ú heag.)Mathematics: : Creation and Study of Form. Addison-Wesley Publ. Comp, 1970.
Lua MLA (8ú heag.)Mathematics: : Creation and Study of Form. Addison-Wesley Publ. Comp, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.