Foster, Richard. Celebration of Discipline. the Path to spiritual Growth Richard J. Foster with Kathryn A. Helmers. - 2nd ed., - London. : Hodder, c2008. - xxii, 281 p. ; 20 cm - . ISBN: 9780340979266 LC Class. No.: BV 4501.2 .F67 2008 c4 / .F67 2008 c4 Dewey Class. No.: 248.4