Foster, C. E., & Palmer, D. S. (2013). Hopper: Drawing / Carter E. Foster with contributions by Daniel S. Palmer. Yale Univ. Press [u.a.].
Lua i Stíl Chicago (17ú heag.)Foster, Carter E., agus Daniel S. Palmer. Hopper: Drawing / Carter E. Foster with Contributions by Daniel S. Palmer. New Haven [u.a.]: Yale Univ. Press [u.a.], 2013.
Lua MLA (8ú heag.)Foster, Carter E., agus Daniel S. Palmer. Hopper: Drawing / Carter E. Foster with Contributions by Daniel S. Palmer. Yale Univ. Press [u.a.], 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.