Vergne, P. (2006). Heart of darkness: Kai Althoff, Ellen Gallagher and Edgar Cleijne, Thomas Hirshhorn.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVergne, Philippe. Heart of Darkness: Kai Althoff, Ellen Gallagher and Edgar Cleijne, Thomas Hirshhorn. Minneapolis, 2006.
एमएलए (8वां संस्करण) प्रशस्ति पत्रVergne, Philippe. Heart of Darkness: Kai Althoff, Ellen Gallagher and Edgar Cleijne, Thomas Hirshhorn. 2006.
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