Hettig, F. (2006). Ecstasy: In and about altered states ; The Museum of Contemporary Art (Los Angeles), 9.10.2005-20.2.2006. Kunstforum.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHettig, Frank-Alexander. "Ecstasy: In and About Altered States ; The Museum of Contemporary Art (Los Angeles), 9.10.2005-20.2.2006." Kunstforum 2006.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHettig, Frank-Alexander. "Ecstasy: In and About Altered States ; The Museum of Contemporary Art (Los Angeles), 9.10.2005-20.2.2006." Kunstforum, 2006.
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