Cobussen, M. (2008). Thresholds: Rethinking spirituality through music. Asghate.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCobussen, Marcel. Thresholds: Rethinking Spirituality Through Music. Aldershot, Hampshire, England ; Burlington, VT: Asghate, 2008.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCobussen, Marcel. Thresholds: Rethinking Spirituality Through Music. Asghate, 2008.
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