APA-čujuhus (7. p.)
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.
Chicago-čujuhus (17. p.)
Goebeler, Hans Jacob, juo 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.
MLA-čujuhus (9. p.)
Goebeler, Hans Jacob, juo John P. Vanzo. Steel Boats, Iron Hearts: A U-boat Crewman's Life Aboard U-505. 1st trade pbk. ed. Savas Beatie, 2008.
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