Cita APA (7a ed.)
Zuercher, S. Enneagram Spirituality: From Compulsion to Contemplation. Ave Maria Press.
Cita estilo Chicago (17a ed.)
Zuercher, Suzane. Enneagram Spirituality: From Compulsion to Contemplation. Notre Dame, EUA: Ave Maria Press.
Cita MLA (9a ed.)
Zuercher, Suzane. Enneagram Spirituality: From Compulsion to Contemplation. Ave Maria Press.
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