"I-506". IJN Submarine Service – Ijnsubsite.info. Retrieved 3 June 2023.
uboat.net
Helgason, Guðmundur. "The Type IXD1 boat U-195". German U-boats of WWII - uboat.net. Archived from the original on 17 February 2010. Retrieved 6 March 2010.
Helgason, Guðmundur. "Cape Neddick (Steam merchant)". German U-boats of WWII - uboat.net. Archived from the original on 12 June 2010. Retrieved 6 March 2010.
Helgason, Guðmundur. "The Type IXD1 boat U-195". German U-boats of WWII - uboat.net. Archived from the original on 17 February 2010. Retrieved 6 March 2010.
Helgason, Guðmundur. "Cape Neddick (Steam merchant)". German U-boats of WWII - uboat.net. Archived from the original on 12 June 2010. Retrieved 6 March 2010.