Costello, M. A. (1989). Levels of living and their geographic context: Northern Mindanao, 1960-1980. NEDA-PDPR Project.
芝加哥风格引文Costello, Michael A. Levels of Living and Their Geographic Context: Northern Mindanao, 1960-1980. [Pasig]: NEDA-PDPR Project, 1989.
MLA引文Costello, Michael A. Levels of Living and Their Geographic Context: Northern Mindanao, 1960-1980. NEDA-PDPR Project, 1989.
警告：这些引文格式不一定是100％准确.