Lua APA (7ú heag.)

Ohff, H. (1967). Karl Oppermann.

Lua i Stíl Chicago (17ú heag.)

Ohff, Heinz. Karl Oppermann. Berlin, 1967.

Lua MLA (8ú heag.)

Ohff, Heinz. Karl Oppermann. 1967.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.