Lua APA (7ú heag.)
Goebeler, H. J., & Vanzo, J. P. (2008). Steel boats, iron hearts: A U-boat crewman's life aboard U-505 (1st trade pbk. ed.). Savas Beatie.
Lua i Stíl Chicago (17ú heag.)
Goebeler, Hans Jacob, agus John P. Vanzo. Steel Boats, Iron Hearts: A U-boat Crewman's Life Aboard U-505. 1st trade pbk. ed. New York: Savas Beatie, 2008.
Lua MLA (9ú heag.)
Goebeler, Hans Jacob, agus John P. Vanzo. Steel Boats, Iron Hearts: A U-boat Crewman's Life Aboard U-505. 1st trade pbk. ed. Savas Beatie, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.