APA (7 वां संस्करण) प्रशस्ति पत्र

Childe, V. G., & Clark, G. (1942). What happened in history. Penguin books.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Childe, V. Gordon, और Grahame Clark. What Happened in History. Baltimore: Penguin books, 1942.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Childe, V. Gordon, और Grahame Clark. What Happened in History. Penguin books, 1942.