Karl G. · Karl M. Gaspar · Karoli Gaspar
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| A people's option: To struggle for creation | 978-971-501-425-0 (971-501-425-9) | 1990 |
| To Be Poor and Obscure: The Spiritual Sojourn of a Mindanawon | 978-971-32-0027-3 (971-32-0027-6) | 2006 |