ERNST, C. W. (1997). The Shambhala guide to sufism. Shambala.
Lua i Stíl Chicago (17ú heag.)ERNST, Carl W. The Shambhala Guide to Sufism. Boston: Shambala, 1997.
Lua MLA (9ú heag.)ERNST, Carl W. The Shambhala Guide to Sufism. Shambala, 1997.
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