Philippines. Bureau of Soils and Management & Sulu Province Land Resources Evaluation Project. (1990). Geological map. Bureau of Soils and Water Management.
Cita Chicago (17th ed.)Philippines. Bureau of Soils and Management i Sulu Province Land Resources Evaluation Project. Geological Map. [Quezon City]: Bureau of Soils and Water Management, 1990.
Cita MLA (9th ed.)Philippines. Bureau of Soils and Management i Sulu Province Land Resources Evaluation Project. Geological Map. Bureau of Soils and Water Management, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.