APA (7th ed.) Citation

Calkins, S. (2021). The sign of the gallows (First world edition.). Severn House.

Chicago Style (17th ed.) Citation

Calkins, Susanna. The Sign of the Gallows. First world edition. London: Severn House, 2021.

MLA (8th ed.) Citation

Calkins, Susanna. The Sign of the Gallows. First world edition. Severn House, 2021.

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