Norddeutscher Lloyd. (1909). The progress of German shipbuilding: With special reference to the evolution of the fleet of the Norddeutscher Lloyd. Hobbing & co., g. m. b. h..
Lua i Stíl Chicago (17ú heag.)Norddeutscher Lloyd. The Progress of German Shipbuilding: With Special Reference to the Evolution of the Fleet of the Norddeutscher Lloyd. Berlin: Hobbing & co., g. m. b. h., 1909.
Lua MLA (8ú heag.)Norddeutscher Lloyd. The Progress of German Shipbuilding: With Special Reference to the Evolution of the Fleet of the Norddeutscher Lloyd. Hobbing & co., g. m. b. h., 1909.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.