http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Key concepts in the practice of sufism [translated by Ali Unal]
Gulen, M. Fethullah [ (Muhammad Fethullah)]
At head of title: Emerald hills of the heart
Includes bibliographical references (p. 177-179) and index