O'Neill, J. J. (1975). The essentials of planning: A personal view. Publications Office, United States Catholic Conference.
Chicago-Zitierstil (17. Ausg.)O'Neill, John J. The Essentials of Planning: A Personal View. Washington: Publications Office, United States Catholic Conference, 1975.
MLA-Zitierstil (8. Ausg.)O'Neill, John J. The Essentials of Planning: A Personal View. Publications Office, United States Catholic Conference, 1975.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.