Pennington, M. Basil, O.C. S.O..
Centered living: The way of centering prayer /
Foreword by R. L. Kushner. 
. - Liguori : Liguori; Triumph,  1999 
. - XXVI, 214 p.  21 cm. 
<br/><label>  ISBN: </label>0-7648-0495-2.