Cita APA (7a ed.)

Childers, E. The riddle of the sands: A record of secret service. T. Nelson & Sons.

Cita Chicago Style (17a ed.)

Childers, Erskine. The Riddle of the Sands: A Record of Secret Service. London: T. Nelson & Sons.

Cita MLA (9a ed.)

Childers, Erskine. The Riddle of the Sands: A Record of Secret Service. T. Nelson & Sons.