Frump, R. (2003). Until the sea shall free them: Life, death, and survival in the Merchant Marine. Arrow Books.
Cita Chicago Style (17a ed.)Frump, Robert. Until the Sea Shall Free Them: Life, Death, and Survival in the Merchant Marine. United Kingdom: Arrow Books, 2003.
Cita MLA (9a ed.)Frump, Robert. Until the Sea Shall Free Them: Life, Death, and Survival in the Merchant Marine. Arrow Books, 2003.
Precaución: Estas citas no son 100% exactas.