APA-viite (7. p.)

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, NEDA.

Chicago-viite (17. p.)

Costello, Michael A., Marilou Palabrica Costello, ja Zenaida Ravanera. Service Provision in the Towns and Cities of Northern Mindanao: Towards a Planning Framework. Pasig: Population/Development Planning and Research Project, NEDA, 1989.

MLA-viite (9. p.)

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, NEDA, 1989.