APA (7 वां संस्करण) प्रशस्ति पत्र

Harker, D. (2003). Tressell: The real story of The ragged trousered philanthropists. IBON Books.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Harker, David. Tressell: The Real Story of The Ragged Trousered Philanthropists. Manila: IBON Books, 2003.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Harker, David. Tressell: The Real Story of The Ragged Trousered Philanthropists. IBON Books, 2003.