APA (7 वां संस्करण) प्रशस्ति पत्र

Foster, S., & Gayford, M. (2001). BP Portrait Award: 1990-2001 / Introductory essay by Martin Gayford. National Portrait Gallery.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Foster, Susie, और Martin Gayford. BP Portrait Award: 1990-2001 / Introductory Essay by Martin Gayford. National Portrait Gallery. London, 2001.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Foster, Susie, और Martin Gayford. BP Portrait Award: 1990-2001 / Introductory Essay by Martin Gayford. National Portrait Gallery. 2001.