Le Queux, W. (1926). Blackmailed. Popular Library.
Cita Chicago (17th ed.)Le Queux, William. Blackmailed. London: Popular Library, 1926.
Cita MLA (8th ed.)Le Queux, William. Blackmailed. Popular Library, 1926.
Atenció: Aquestes cites poden no estar 100% correctes.