IMHOF, E. (1982). Cartographic relief presentation - Eduard Imhof; H.J.Steward (editor). Walterde Gruyter.
Lua i Stíl Chicago (17ú heag.)IMHOF, Eduard. Cartographic Relief Presentation - Eduard Imhof; H.J.Steward (editor). Walterde Gruyter, 1982.
Lua MLA (8ú heag.)IMHOF, Eduard. Cartographic Relief Presentation - Eduard Imhof; H.J.Steward (editor). Walterde Gruyter, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.