Roberts, R. A. (1880). On some properties of certain plane curves.
Lua i Stíl Chicago (17ú heag.)Roberts, R. A. On Some Properties of Certain Plane Curves. 1880.
Lua MLA (9ú heag.)Roberts, R. A. On Some Properties of Certain Plane Curves. 1880.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
