American Psychological Association
Link, Mark ( 1990 ). Challenge: A Meditation Program Based on the Spiritual Exercises of St Ignatius ( 00 ed. ). St Paul Press Training School.
Modern Language Association
Link, Mark. Challenge: A Meditation Program Based on the Spiritual Exercises of St Ignatius . St Paul Press Training School. 1990
Chicago Citation
Link, Mark. Challenge: A Meditation Program Based on the Spiritual Exercises of St Ignatius . 00 .Mumbai
: St Paul Press Training School, 1990.
American Medical Association
Link, Mark. Challenge: A Meditation Program Based on the Spiritual Exercises of St Ignatius . St Paul Press Training School; 1990.