Philippines. Regional Development Council. Region XI & Philippines. National Statistical Coordination Board. Regional Statistical Coordination Committee XI. (2002). Davao region statistical yearbook: DRSY. Regional Development Council XI Regional Statistical Coordination Committee XI, National Statistical Coordination Board XI.
Cita Chicago (17th ed.)Philippines. Regional Development Council. Region XI i Philippines. National Statistical Coordination Board. Regional Statistical Coordination Committee XI. Davao Region Statistical Yearbook: DRSY. Davao City: Regional Development Council XI Regional Statistical Coordination Committee XI, National Statistical Coordination Board XI, 2002.
Cita MLA (9th ed.)Philippines. Regional Development Council. Region XI i Philippines. National Statistical Coordination Board. Regional Statistical Coordination Committee XI. Davao Region Statistical Yearbook: DRSY. Regional Development Council XI Regional Statistical Coordination Committee XI, National Statistical Coordination Board XI, 2002.