APA引文

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引文

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

警告：這些引文格式不一定是100％准確.