Lua APA (7ú heag.)

(1955). Wilhelm Pieck. Dietz.

Lua i Stíl Chicago (17ú heag.)

Wilhelm Pieck. Berlin: Dietz, 1955.

Lua MLA (8ú heag.)

Wilhelm Pieck. Dietz, 1955.

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