Böwering, G. (1979). The mystical vision of existence in classical Islam: The Qur'ānic hermeneutics of the Ṣūfī Sahl At-Tustarī (d. 283/896). Walter de Gruyter.
Citace podle Chicago (17th ed.)Böwering, Gerhard. The Mystical Vision of Existence in Classical Islam: The Qur'ānic Hermeneutics of the Ṣūfī Sahl At-Tustarī (d. 283/896). Berlin ; New York: Walter de Gruyter, 1979.
Citace podle MLA (9th ed.)Böwering, Gerhard. The Mystical Vision of Existence in Classical Islam: The Qur'ānic Hermeneutics of the Ṣūfī Sahl At-Tustarī (d. 283/896). Walter de Gruyter, 1979.
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