Costello, M. A. (1989). Levels of living and their geographic context: Northern Mindanao, 1960-1980. NEDA-PDPR Project.
Citazione stile Chigago Style (17a edizione)Costello, Michael A. Levels of Living and Their Geographic Context: Northern Mindanao, 1960-1980. [Pasig]: NEDA-PDPR Project, 1989.
Citatione MLA (9a ed.)Costello, Michael A. Levels of Living and Their Geographic Context: Northern Mindanao, 1960-1980. NEDA-PDPR Project, 1989.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.