Presas i Puig, A. (2005). Spain in 1952 as seen by a German warship builder: Modernisation programmes of the submarine fleet under Franco's first regime and German specialists. Max-Planck-Institut für Wissenschaftsgeschichte.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Presas i Puig, Albert. Spain in 1952 as Seen by a German Warship Builder: Modernisation Programmes of the Submarine Fleet Under Franco's First Regime and German Specialists. Berlin: Max-Planck-Institut für Wissenschaftsgeschichte, 2005.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Presas i Puig, Albert. Spain in 1952 as Seen by a German Warship Builder: Modernisation Programmes of the Submarine Fleet Under Franco's First Regime and German Specialists. Max-Planck-Institut für Wissenschaftsgeschichte, 2005.
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