Cita APA (7th ed.)

Costello, M. A., Costello, M. P., & Ravanera, Z. (1989). Service provision in the towns and cities of Northern Mindanao: Towards a planning framework. Population/Development Planning and Research Project.

Cita Chicago (17th ed.)

Costello, Michael A., Marilou Palabrica Costello, i Zenaida Ravanera. Service Provision in the Towns and Cities of Northern Mindanao: Towards a Planning Framework. [Makati, Metro Manila]: Population/Development Planning and Research Project, 1989.

Cita MLA (9th ed.)

Costello, Michael A., et al. Service Provision in the Towns and Cities of Northern Mindanao: Towards a Planning Framework. Population/Development Planning and Research Project, 1989.