Pape, H. Object and final cause in Peirce's semeiotic: Helmut Pape. Peirce's doctrine of signs : theory, applications, and connections.(1996).
Lua i Stíl Chicago (17ú heag.)Pape, Helmut. "Object and Final Cause in Peirce's Semeiotic: Helmut Pape." Peirce's Doctrine of Signs : Theory, Applications, and Connections.(1996) .
Lua MLA (8ú heag.)Pape, Helmut. "Object and Final Cause in Peirce's Semeiotic: Helmut Pape." Peirce's Doctrine of Signs : Theory, Applications, and Connections.(1996), .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.