Metaxas, E., & Heller, J. (2008). Amazing grace: William wilberforce and the heroic campaign to end slavery (Unabridged.). Tantor Media.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMetaxas, Eric, और Johnny Heller. Amazing Grace: William Wilberforce and the Heroic Campaign to End Slavery. Unabridged. Old Saybrook: Tantor Media, 2008.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMetaxas, Eric, और Johnny Heller. Amazing Grace: William Wilberforce and the Heroic Campaign to End Slavery. Unabridged. Tantor Media, 2008.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.