Gaya APA
Ivens, M. (1998).
Understanding the Spiritual Exercises: Text and commentary, a handbook for retreat directors. .
Leominster:
Leominster Gracewing.
Gaya MLA
Ivens, Michael.
"Understanding the Spiritual Exercises: Text and commentary, a handbook for retreat directors. ".
Leominster:
Leominster Gracewing,
1998.
Buku.