APA (7th ed.) Citation

Childers, E. (2018). The riddle of the sands: A record of secret service recently achieved. David R. Godine.

Chicago Style (17th ed.) Citation

Childers, Erskine. The Riddle of the Sands: A Record of Secret Service Recently Achieved. Boston: David R. Godine, 2018.

MLA (9th ed.) Citation

Childers, Erskine. The Riddle of the Sands: A Record of Secret Service Recently Achieved. David R. Godine, 2018.