Broughton's Nautical Academy. Broughton's Nautical Academy. [s.n.], [1911?].
Cita Chicago (17th ed.)Broughton's Nautical Academy. Broughton's Nautical Academy. London: [s.n.], [1911?].
Cita MLA (9th ed.)Broughton's Nautical Academy. Broughton's Nautical Academy. [s.n.], [1911?].
Atenció: Aquestes cites poden no estar 100% correctes.