APA (7th ed.) Citation

Horler, S. (1937). Instruments of darkness. Hodder and Stoughton.

Chicago Style (17th ed.) Citation

Horler, Sydney. Instruments of Darkness. London: Hodder and Stoughton, 1937.

MLA (8th ed.) Citation

Horler, Sydney. Instruments of Darkness. Hodder and Stoughton, 1937.

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