APA aipamena

Costello, M. A. (1989). Levels of living and their geographic context: Northern Mindanao, 1960-1980. Population/Development Planning and Research Project.

Chicago Style aipamena

Costello, Michael A. Levels of Living and Their Geographic Context: Northern Mindanao, 1960-1980. [Makati, Metro Manila]: Population/Development Planning and Research Project, 1989.

MLA aipamena

Costello, Michael A. Levels of Living and Their Geographic Context: Northern Mindanao, 1960-1980. Population/Development Planning and Research Project, 1989.