Siebert, R. J. (1985). Critical Theory of Religion:the Frankfurt School: From universal pragmatic to political theology. Mouton Pubs.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSiebert, Rudolf J. Critical Theory of Religion:the Frankfurt School: From Universal Pragmatic to Political Theology. Mouton Pubs, 1985.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSiebert, Rudolf J. Critical Theory of Religion:the Frankfurt School: From Universal Pragmatic to Political Theology. Mouton Pubs, 1985.
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