APA (7th ed.) Citation

Duncan, R. (2016). The custodian of marvels. Angry Robot.

Chicago Style (17th ed.) Citation

Duncan, Rod. The Custodian of Marvels. Nottingham [England]: Angry Robot, 2016.

MLA (9th ed.) Citation

Duncan, Rod. The Custodian of Marvels. Angry Robot, 2016.

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