APA (7 वां संस्करण) प्रशस्ति पत्र

Prebble, L., & Harding, L. (2019). A very expensive poison. Methuen Drama/Bloomsbury Publishing Plc.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Prebble, Lucy, और Luke Harding. A Very Expensive Poison. London, UK: Methuen Drama/Bloomsbury Publishing Plc, 2019.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Prebble, Lucy, और Luke Harding. A Very Expensive Poison. Methuen Drama/Bloomsbury Publishing Plc, 2019.