Courbet, G., & Chu, P. t. (1992). Letters of Gustave Courbet: Gustave Courbet. Ed. and transl. by Petra ten-Doesschate Chu. Univ. of Chicago Press.
Lua i Stíl Chicago (17ú heag.)Courbet, Gustave, agus Petra ten-Doesschate Chu. Letters of Gustave Courbet: Gustave Courbet. Ed. and Transl. by Petra Ten-Doesschate Chu. Chicago, Ill. [u.a.]: Univ. of Chicago Press, 1992.
Lua MLA (8ú heag.)Courbet, Gustave, agus Petra ten-Doesschate Chu. Letters of Gustave Courbet: Gustave Courbet. Ed. and Transl. by Petra Ten-Doesschate Chu. Univ. of Chicago Press, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.