Foster, S. C. The mortality of roles: Johannes Baader and spiritual materialism / Stephen C. Foster. Dada culture : critical texts on the Avant-garde.(2006).
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFoster, Stephen C. "The Mortality of Roles: Johannes Baader and Spiritual Materialism / Stephen C. Foster." Dada Culture : Critical Texts on the Avant-garde.(2006) .
एमएलए (8वां संस्करण) प्रशस्ति पत्रFoster, Stephen C. "The Mortality of Roles: Johannes Baader and Spiritual Materialism / Stephen C. Foster." Dada Culture : Critical Texts on the Avant-garde.(2006), .
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