Παραπομπή σε μορφή APA (7η εκδ.)

Cruz, R. V. O. (1990). Landuse suitability assessment and land capability classification in Ibulao watershed, Philippines. UMI Dissertation Services.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Cruz, Rex Victor Oafallas. Landuse Suitability Assessment and Land Capability Classification in Ibulao Watershed, Philippines. Ann Arbor, Mich: UMI Dissertation Services, 1990.

Παραπομπή σε μορφή MLA (9th εκδ.)

Cruz, Rex Victor Oafallas. Landuse Suitability Assessment and Land Capability Classification in Ibulao Watershed, Philippines. UMI Dissertation Services, 1990.