APA (7th ed.) Citation

Henty, G. A. (2015). Colonel thorndyke's secret.

Chicago Style (17th ed.) Citation

Henty, George Alfred. Colonel Thorndyke's Secret. 2015.

MLA (9th ed.) Citation

Henty, George Alfred. Colonel Thorndyke's Secret. 2015.

Warning: These citations may not always be 100% accurate.